Personal background: National Examination 75.2, Provincial Examination 85+.
In each module, data analysis is prepared to achieve steady high scores.
So how do we do it fast and right and high? I spent a lot of time preparing for this, and, of course, it was worth it.
I have also done a great deal of work to write this article, and I’ve finished with an outline, a case study (the example of what you’re going to say from the tens of thousands of truths, which is really going to throw up), the production of assistive tools, and repeated revisions to the proofreading.
Note: This document is suitable for candidates who have already entered the system and who wish to enter it. If there is no basis for data analysis, go and see the video of the institution. (Some of the online lessons are useful for entry, and there are a lot of free resources available online, and you are encouraged to support the original version.)
Let’s get to the point. You need to have three keys if you want to break through the data.
The three keys correspond to three parts of the data analysis.
First key: rapid response formula
(i) First, we need to have a full picture of the target audiences involved in the analysis.
Other, more rare, are the rate of development, the rate of contribution to growth and the rate of growth.
(ii) Second, you need to know and understand the equation for the object
Here, I’m not going to list some basic formulas, either in my little back formula tool (a later introduction).
Because I’m using this article to advance, I’d like to focus on a few of the formulas that you can confuse.
1 Two-stage weight differential (frequency of occurrence: medium)
Example: This year the number of apples is A, with a year-on-year growth rate of a, while the total number of fruits is B, with a year-on-year growth rate of b. How many percentage points did apples account for fruit over the previous year?
But it’s just a general description, and we should remember the following:
Why reorder? Because it can significantly shorten our time.
In practical terms, the question-makers do not want us to calculate the formula in its entirety with precision, so the gap between options is often well designed so that you can estimate the solution.
“a-b” can be calculated; “A/B” does not need to be counted, but it can probably be reduced to a few points; for “1/(1+a)”, if a 10% does, then the final result needs to be adjusted to the `1/(1+a)’ value.
These steps can be measured.
Case No. 1: Real Question No. 117 from the 2016 entrance examination for civil servants in Shandong Province
In the first quarter of 2015, a province ‘ s provincial and above parks (hereinafter referred to as parks) received 70,628.5 billion yuan, an increase of 11 per cent over the same period.
[Question] In the first quarter of 2015, the share of tax revenues from the main operations of the provincial park enterprises compared to the same period of the previous year:
A. Up 0.1 percentage points B. Up 3.1 percentage points C. down 0.1 percentage points D. down 3.1 percentage points
Arguments: In view of the problem, two periods of differential weight. I’m going to jump out of my head, find data, calculate. a-b = 14.1-11 per cent = 3.1 per cent, A/B≈223/7062≈2/70, which is sufficient. We know the difference between two periods is positive and much smaller than 3.1%, so choose A.
2 Average growth (frequency of occurrence: low)
Example: This year the number of apples is A, the growth rate is a year on year, the number of apple trees is N and the growth rate is n on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on end of year on year on year on, year on year on year on year on year on year on year on year on year on year on year on year on year on year on, year on year on year How many more apples per apple tree than last year?
Although it is in the same form as the formula in paragraph 1, the meaning is quite different. In 1 the “A/B” represents the proportion and the size is in the range (0,1), while the current “A/N” represents the average and the size is generally much greater than 1.
For this, we should follow the following pattern:
This type of question appears less frequently, and when it is done, it is generally necessary to calculate the whole of the formula to begin the comparison.
3 Average growth rate (frequency of occurrence: low)
Example: This year the number of apples is A, the growth rate is a year on year, the number of apple trees is N and the growth rate is n on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on year on end of year on year on year on, year on year on year on year on year on year on year on year on year on year on year on year on year on year on, year on year on year What is the average number of apples on an apple tree (growth rate) more than last year?
It should be noted that there is no “A” and “N” in the formula, which greatly reduces the amount of time taken to calculate and do the questions.
Case 2: 208 Question 86 of the Real Question B of the Admission Examination for Civil Servants in Shanghai
[materials] During the first half of 2017, the S municipality exported 190 million mobile phones, a decrease of 22.7 per cent over the same period last year; the value was RMB 51.31 billion, a decrease of 23.7 per cent. I don’t know.
[Question] In the first half of 2017, the average value of an export mobile phone in S city was about ___ more than in the same period last year.
A. Increase 0.8 per cent B. Increase 1.3 per cent C. Decline 0.8 per cent D. Decline 1.3 per cent
E: According to the formula, a-n=23.7% -(-22.7%) = -1%, growth is negative, 1+n = 1+ (-22.7%) = 77.3%, average growth = -1/7.7%, need not be counted, only B and D with absolute values greater than 1, and therefore D is selected because they are negative.
These are the three formulas that I think you need to take care of as we move forward, they are prone to confusion, and if you do it blindly, you’ll waste a lot of time, so I want you to know what you’re going to do with the subject.
I think it’s also important for other basic formulas, but the general body will teach them, and I will not repeat them.
In the end, you have to carry all the formulas.
If you don’t have a formula for the test, then the wisest choice is to give up.
In order to avoid this awkward situation, I thought about it and gave you a small tool of a back formula. As shown:
The simple way to use it is to open the xls file that I’ve sorted out in Microsoft Excel 2007 and then press Ctrl+Q, and then pop up the back-to-back interface, in plain white.
More importantly, in addition to the knowledge points I’ve prepared in advance, you can add to them other knowledge points you want to remember well, with great flexibility.
(Turn down here, suddenly, to interject: If you go to the office later, you’ll find two of the most frequent office software you’ve ever been exposed to are Word and Excel, and learn how to use Excel, and you’re the hottest kid in the class!
The method of acquiring the tools is at the end of the text.
II. SECOND KEY: Accurately finding data
Each step of the analysis requires “quick” but, in looking for data, I want you to be “fine” before “quick.”
The data will be found mainly in the following areas, in order of importance:
(i) Time
The most common pit is the one described in the material this year, and the problem is solved by last year’s indicators. If they don’t take a closer look at the subject, they may have been given half a day or wrong.
For time, you also need to pay attention to the following:
One, is the timeline straight or reverse?
Case No. 3: Question 119 (second half of the year) on the Real Test for Admission to the Chongqing City Civil Service in 2016
I don’t know why the questionrs want to draw the time in reverse.
2 The time span can be expressed not only in numbers but also in text.
Case No. 4: Question 125 of the Real Test for Admission to Public Service in Heilongjiang Province in 2015
The following statement is correct:
I don’t know.
B. Free lunches since start-up with an average monthly contribution of less than $2 million in 2011
I don’t know.
The B option for this question is to divide the 2011 total income by 12 per cent as soon as candidates see the average monthly contribution income for 2011. But the word “since” was ignored, because the first three months had to be removed, because the free lunch fund had only started in April.
(ii) Object of calculation
With regard to “calculated objects”, you need to note the following:
1 The object words found at the beginning of the paragraph should be noted whether there are any similar objects after them.
Case No. 5: Question 131 of the Real Question of Conduct for the 2016 National Civil Service Admission Examination (Sub-Provincial)
When looking for the object of the calculation, care should be taken because some objects are described in very similar ways and are distinguished. In some subject materials, the description of the object is even one word different.
On the basis of the options, please determine whether the “growth” or “growth” is sought before looking for data.
3 With regard to the subject of the comparison, note whether the “homogeneity” or the “rings” are the same.
4 With regard to the target of imports and exports, note whether “import” or “export”.
(iii) Units
In terms of “units”, the difference between a percent and a thousand fractions is that 99% of the questions appear as a percentage number, but that doesn’t preclude you from having a one percent of the number.
Case No. 6: Real Question 116 of the 2014 Henan Provincial Civil Service Admission Examination
(iv) Legend
For material with a statistical chart, let’s take a look at the legend, see if it represents a single or a cumulative amount.
It should also be noted that some of the illustrations are not “cumulative”, but are cumulative. For example:
Case 7: Question 101 (second half of the year) of the Chongqing entrance examination for civil servants in 2016
Population statistics are also common.
These are some of the aspects that I think should be taken into account in the search for data, but the place where everyone makes mistakes is different, so I would like you to be more focused by taking stock of what you’re looking for.
Third key: fast-tracking techniques
First, there are a number of points to be made: 1. Most of the questions do not require precise calculations, otherwise it is not possible to do 20 in 25-30 minutes (the calculator is not missing in the body); 2. After looking at the options, the characteristics of the options determine the way in which you calculate them; 3. The techniques are not very sophisticated and are useful only if they are mastered.
Note: The skills of online data analysis are very varied, and I learned a lot when I was ready to take a test, but that’s all that really worked out. The purpose of this section is to make it less difficult.
Most of the following methods are available at the time of my examination, and I don’t know and can’t verify who the original was, but in order to pay tribute, I’ll explain who I first saw in whose class.
Because the techniques of the later are related to a knowledge point — the judgement of the gap in options — this is the first place to add this knowledge.
(i) Options gap determination criteria
“The options are wide” means:
1 The first of the four options is different. For example, Beijing City Examination No. 126 of 2018, with four options: A.22 B.33 C.43 D.55. The first of A is 2 and B is 3 and C is 4 and D is 5, which is the first difference. So the question can be considered as “a big gap in options”.
2 There are two options that are the same for the first, but the difference between them (the difference between the second) is greater than the first. For example, Beijing City Examination No. 126 of 2017 (the same number and type as the previous year, astonishment!) has four options: A.387 B.320 C.265 D.214. The closer options are two groups, A and B, C and D. The first for A and B are 3 and the second for A and B is 8 and the second for B is 8-2 and 6 > first 3; the first for C and D are 2 and C and D are 6-1 > first 2. So the question can be seen as a big gap in options.
“Small options” means:
There are two options that are the same for the first, and the difference between the two options is less than or equal to the first. For example, in 2012 Zhejiang Province, question 128, with the option of A.85.40% B.84.70% C.83.50% D.82.70%. The first is the same, both 8 and the secondary difference is less than 8 (there is actually a subdivision difference of less than 8), so the question can be considered to be a small option.
(ii) Accounting techniques
Depending on the context of the application, I have classified the operation techniques into the following categories:
1 Application of most common computing techniques — cut-off straight (first in chalk).
Application scenario: Multidigitals divided by multidigits (I call three digits and above).
Specific operations:
a. Intercept who? Only the denominator
How?
Two: Left to right, two, third rounded. For example, the denominator is 999/23.
Three: left to right, three, fourth rounded. For example, the trio is 999/235.
c. How do we divide them in a transposition, depending on the characteristics of the option? If the options are wide, then rounded to two. If the options are small, then rounded to three.
Case 8 Question No. 12 of the 2008 Shanghai Examination for Civil Servants
In the first three quarters of 2007, gross domestic product (GDP) amounted to $166,604.3 billion, an increase of 11.5 per cent over the previous three quarters.
[Question] In the first three quarters of 2007, the value added by the tertiary sector was about the following:
A.11 per cent B.39 per cent C.45 per cent D.50 per cent
Solving: The reading problem, when you find the data in the material, take a look at the options, find the options very different, then cut the denominator to two, or 64358/17, and it’s easy to say first of all that the result is three, option B.
Case 9: Zhejiang Province, 2012
In 2010, we invested 70.626 billion yuan in research and experimental development (R&D, hereinafter referred to as R&D), an increase of 21.7 per cent over the previous year.
[Question] National funding for pilot development in 2010 is about R&D:
A.85.4% B.84.7% C.83.5% D.82.7%
Argument: Looking at the problem, after finding the required data in the material, looking at the options, and finding the options to be small (the first option is the same and the second is less than the first), cut the denominator three times, column 5844.3/706, and the first two easy to bargain 82, option D.
2 Multiple digits plus sum — high supersingle, end plus minus
a. High-level supersing (first seen in peanut XIII)
Application scenario: Multiple multidigit plus.
Specific operations: Summation from the top by digits and then superseding.
Question x: Please calculate this option: 244.5 + 70.9 + 237.7 + 245.9 + 362.7 + 536.7 + 134.9 + 181.3 =? The closest options are:
A.190 B.200 C.210 D.220
Otherwise, using primary school methods, copying these numbers on draft paper, using 40s, plus calculations, takes a total of 1 minute, 30 seconds.
It would be simple to use a high-level superposition.
First step: to start with the highest percentage, 100 plus and: 2+0+2+2+3+5+1+1=16, 10 plus: 4+7+3+4+6+3+3+8=38, plus plus 4+0+7+5+2+6+4+1=29, plus 10 plus 5+9+7+7+9+3 =56.
The second step is followed by the staggering of the numbers, each staggered, as shown in the figure below.
When you see this place, you’ll have to ask. It’s mostly a first step, and you find that the first step can be done by word, and you don’t have to copy every number of numbers on the subject, and write down that [and] on the draft paper and then fold it. The calculations on the draft paper are just as good as the above, so the process is fast.
This is not the only place where high-level superpositioning works, and sometimes we do not need to add exactly to the last, so that we can stop at the right time when the first step begins at the top.
For example, the rulex above, we just need to make it up to the hundred and ten. Then it is only possible to measure the sum of 2+0+2+2+3+5+5+1+1=16, the sum of 10 plus 4+7+3+4+6+3+3+8=38. Then we’ll have the following superheave. The answer is “B.”
Having said so much, it’s the last real question, more intuitive.
Case No. 10: 2012 915 Question 113 of the Real Question of the Study (Xinjiang/Fukuyan/Chongqing/Henan)
In 2012, our summer food production was better. I don’t know.
[Question] In 2012, 11 of the main producing provinces (regions) planted around the country ‘ s total area:
A.52 per cent B.67 per cent C.71 per cent D.85 per cent
Note: Careful students may find that I’ve taken the calculations from this material, but this is three times more than before. Let’s see if it’s going to be harder.
Solving: Reading questions identify the solver, and after finding the data in the material, take a look at the options, and find that the options are very different. The denominator is 2757, and you can intercept two. The molecule is the sum of 11 provinces (districts) in the area of summer grain sowing, calculated and using a high-level supersing method. Decalogue: 4+7+3+4+6+3+3+8+2+9+0; plus 4+0+0+7+7+5+2+2+2+0; plus 4+0+7+2+2+2+2+6+6+8+8 =51. Wrong +2341. The weight = 2341/28, the first to be directly measured is 8, option D, correct.
You can try your own way of trying how much time it took to do it with a high-level supercharge.
“I don’t know.”
Q: How is it wrong that some digits add up and not add up, such as 162 + 41 + 90+203 + 51 + 122, hundreds add up and single add up?
Answer: Without a single digit and a zero in the front, see a double digit and then make a misalignment. Hundreds: 1+0+0+2+0+1 =04, ten digits: 6+4+9+0+5+2 =26, by 2+1+0+3+1+2 =09.
b. End numbers added
Apply the scenario: The solution is multiple numbers or differences, and the option is accurate to the last and the end number of options varies.
Specific operations: Just add the end number of multiple numbers.
Case No. 11:2019 Question 81 of the Real Question of the Survey of Admissions to Public Service in Guangdong Province
Over the past five years, the country has integrated transport for poverty alleviation and “good rural roads”, and rural infrastructure has improved and services for rural renewal have been effective.
[Question] In 2014-2018, a total of 10,000 kilometres of new rural road miles were renovated throughout the country.
A.77.5 B.97.4 C.117.2 D.137.7
Solve: The options are precise to the last and the end numbers vary, so only the end numbers add up. 0+1+3+5+5+8 =17, with an end number of answers of 7, option D.
3 Three-part growth calculation – hypothetical, 100% growth, approximate base period
With regard to the calculation of the volume of growth, the high frequency and difficulty of calculating is a high priority for data analysis. I’ve been working on it for a long time, I’ve been reading a lot of lessons, and I’ve finally developed a system of rapid computing techniques.
a. Assumptions (first seen in peanut XIII, where I add some personal understanding of its use)
Core thinking: By assuming the base period, the real growth is constantly approaching.
Specific: Direct to the case.
Case 12:2017 422 Zhejiang B.
In June 2016, the retail value of urban consumer goods was $23.82 billion, an increase of 10.5 per cent.
[Question] What was the increase in retail sales of urban consumer goods in 2016 over the same period of the previous year?
A $388 billion B21.69 billion C119.3 billion D219.3 billion
Parsing: The normal column should be (2308/1.105 * 10.5%), which is too time-consuming. So what’s the use of assumptions?
Step 1: Write on the draft paper the current level 23082 as the target value (and remove decimal points if available) and the growth rate 10.5%.
Step 2: At the lower left corner of the target value, assume a base period of 20000, which [assuming base period] is typically the number of ten, 100, 1,000, 10,000 … Then at the bottom right of the current period, the mouth calculates the corresponding growth of 20000*10.5% = 2100 at the bottom right of the target value 23082.
Step 3: The sum of [assuming base period] 20000 and its growth of 2100 will be added to the target above 23082 and received [current balance] 982.
Step 4: Make [current residuals] 982 a new goal, repeat steps 2 and 3, get [current residuals]-12.5 and indicate that the assumed base period is slightly larger than 900, which is okay and can continue.
Step 5: Make [current residual]-12.5 a new objective, repeat steps 2 and 3, and get -0.45. At this stage, look at the three digit plus sum on the right, 2100+94.5-1.05 = 2193. This 2193 is the amount of growth the subject seeks.
You can press the calculator. The number is 2193.31.
There is no difference between the number of hypotheses and the number of calculators, and the hypothesis is so precise because it is approaching real values at every step. And hundreds of them are easy to calculate, so quickly.
In addition, it has the added advantage of being able to “stop point”, i.e., to decide when to stop, depending on the options gap.
For example, the two closest to the subject are B and D, and they have a difference in third place, six and nine, so we can finish with the bottom layer when we use the hypothesis. (Because the breakdown of 12.5 has no effect on the ten digits of the increase) Based on 2100+94.5 = 2194.5, option D is available.
There is also the advantage of an assumption that, in calculating growth, base periods can also be obtained at the same time. For example, in the previous question, the sum of 2194.5 on the right is the increase, the sum of 20,900 on the left is actually the base period.
A one-size-fits-all, with base periods and growth, may help to decipher the final synthesis of each data set.
Case 13: The 2011 Shenzhen Civil Service Admission Examination, Fact Sheet 76
[Text] Gross domestic product (GDP) for the year 2009 was $33,535.3 billion, an increase of 8.7 per cent over the previous year. I don’t know.
[Question] On the basis of preliminary accounting in the 2009 Bulletin of National Economic and Social Development Statistics, the gross domestic product (GDP) for the whole year increased about the previous year:
A.2684.1 billion B.2689.7 billion C265.4 billion D269.95.5 billion
Solve: Clearly the options are small and need to be accurately calculated, and only a hypothetical approach can be chosen for this topic.
13.5 A small scale compared to 530, so the decomposition of the lower right corner would also be a smaller one than 43.5, so that the decomposition of 13.5 can only affect the individual digits of the increase, and the impact on the outcome is insignificant, so that there is no need to decompose 13.5.
Real growth is close to 26100 + 783-43 = 26840 (0.5 out of 43.5), which can be ignored, and the number of digits and deciles can be adjusted at will for ease of calculation because they have little impact on the outcome) to select A.
Case No. 14: 2018 421 Question 108 of the Real Question of the Study (Tientsin volume)
[Text] In the first half of 2017, per capita disposable income per inhabitant.
[Question] In the first half of 2017, how much more was the net income per capita than in the previous year?
A.92 B.102 C.112 D.122
Solve: The options are small, cautious and hypothetical.
-40 The decomposition of the bottom right must be negative, real growth is 96 small, option A.
b. 100% growth rate
The simple approach is to translate the growth rate X per cent into a fraction 1/N (when the growth rate is negative, N is also negative), which can be derived from the following extrapolation = current/(N+1).
Case No. 15: 2019 420 Question 99 of the Real Question of the Study (Gilin B)
According to [materials] The national per capita net income of fishers in 2017 was $18452.78, an increase of 9.16% over the previous year.
[Question] In 2017, the per capita net income of fishers in the country increased by approximately per capita:
A.1550 B.1700 C 1850 D.1900
E: Reading questions determine that the solver is growth, and when data are found, a look at the options and find that the options are small and are logically hypothetical. But because 9.16% is very close to 9.1%, or 1/11. So there’s a small deviation in the growth from using centipede. Column 18452.78(11+1) = 1537, option A.
Discussion: If this is the case, I will change the growth rate to 11.5 per cent, and see what you can do.
Case 16:2019 Question 99 (revision)
According to [materials] The national per capita net income of fishers in 2017 was $18452.78, an increase of 11.2 per cent over the previous year.
[Question] The per capita net income of fishers in the country increased by about a year in 2017.
A.1550 B.1700 C 1850 D.1900
Evidently, the difference between 11.5% and 11.1% is greater, with the forced use of the centimeter, 18452.78/1+9) = 1845, which you do not know whether to choose C or D, because you can’t grasp how much growth has been reduced in the process of reducing the 11.5% to 11.1%. In fact, when the growth rate is 11.5 per cent, it should be 1900.
“Shrimp + centimeter” does not generally apply to small options. And that’s why I said in my analysis of the original case, “It’s a small gap in the options, and it’s a hypothetical method.
How do you know how to use centipede?
It’s simple to understand, but it’s a bit of a threshold, and you need to be familiar with the correlation between percentages and scores.
Of course, I’ve prepared a response, remembering the little recitation tool that was shared earlier, which can also be used to reverse the percentages and points.
c. Approximation of the base period
This is even simpler, where the options are wide and the growth rate x per cent meets -5 per cent, so that the current period can be seen as almost a base period and then multiplied by the growth rate.
Case 17: Question 81 of the Real Question A of the 2015 Shanghai Civil Service Admission Examination
In the first quarter of 2014, the total industrial output above the Shanghai market was 77,1926 billion yuan, an increase of 4.0 per cent over the same year. Industrial sales above scale 762.227 billion yuan, 2.1 per cent over the same period
[Question] In the first quarter of 2014, the total industrial output above the Shanghai market was approximately ___ billion more than the increase over the same period.
A.70 B.140 C.210 D. 280
Solving: We need to ask for two increments, the options are very different and the growth rate is less than 5 per cent, so we use the approximation of the base period. Total industrial output above the size of the Shanghai market = 7719 * 4% = 77.19 * 4 * 77 * 4 = 308 and sales output = 7622 * 2.1 = 76.22 * 2.1 ≈ 76 * 2.1 = 160,308-160 = 148 for the same period = 7622 * 2.1 = 160,308 = 148, closest to item B 140, Option B, positive.
(a) Summary of growth calculations (original): In summary, when we are dealing with normal growth calculations, we can choose the appropriate formula for the calculation according to different circumstances:
1 When the option is out of range, select the scenario.
2 When the options are wide and the growth rate is > 5%, centigrade is used.
3 The approximation of the base period is used when the options are wide and the growth rate is < 5 per cent.
Welfare!
You can click on the file analysis back formula tool to enter the extraction code sezc.
With regard to this benefit, I would like to thank the following fellow students, who inspired me and made me feel obliged to send this little tool to you.
This plugin was just a little tool I used to get to know the formula when I was writing this analysis, but after looking at his question, I think you might need it. While it might help us get to know the formula, the time cost is too high. The most efficient way to do this is to go back to the formula with five minutes a day before the question is done.
If you can prepare in advance, don’t let it go!
It’s a little flattering to be writing here, with both a summary and a handyman.
So the big housework has to make good use of it!
Note: Many acquaintances have not actually used the tools, hoping that they will overcome squirrel disease and that they will adhere to the daily rereading of formulas and knowledge points. What is more critical is that the three keys mentioned in this article are fully mastered to ensure accuracy and speed.
Although the rating criteria are not known, it is important to note that, based on the experience of the individual examination, the value of the data analysis in the INA test papers is at least 1 point/problem. All I knew was that in 30 minutes, the correct rate was over 90%, and the score was not less than 70. Case number: YXA1Mbx8KMBUd56eyxosRgRr
I don’t know.
Keep your eyes on the road.
