"Principles of Statistics" final exam papers and answers
1. Multiple choice questions (this major question has a total of 10 questions, each question is worth 2 points, a total of 20 points)
1. Indicate which of the following is a quantity symbol ()
A. HeightB. Educational qualifications
C. Health statusD. gender
2. Statistical surveys are divided into one-time surveys and recurring surveys, based on ().
A. Is it done regularly B. Different ways of organizing
C. Whether to investigate all units D. Whether time is continuous.
3. The key unit in a typical survey is ()
A. A unit that does a good job B. The unit with the most problems at work
C. A unit that plays a decisive role D. a representative minority of units
4. The key to statistical grouping is ().
A. Determine the group median B. Determine group distance
C. Determine the number of groups D. Select group flags and define group boundaries
5. The variable sequence is ().
A. Sequence of numbers grouped by quantity sign B. Sequence grouped by quality flag
C. Sequences grouped by quantity marks or quality marks D. Series grouped by quantity metric
6. Equidistant sequence and distanced sequence are two forms of grouped sequence, in which distanced sequence refers to ().
A. A sequence of numbers with equal degrees in each group B. Sequences with unequal degrees in each group
C. A sequence of numbers with equal distance between groups D. A sequence with unequal intervals between groups
7. The difference between simple grouping and compound grouping is ().
A. The complexity of grouped objects is different B. The number of groups is different
C. How many different grouping flags are used D. Research purposes and objects are different
8. A: The number of births in Anhui Province at the end of 2003 was 7.15 million; B: The total population of Anhui Province in 2003 was 46.8 million.
but().
A. A is the period indicator, B is the period indicator B. A is a time point indicator and B is a period indicator.
C. A is the period indicator, B is the time point indicator D. A is the time point indicator, B is the time point indicator
9. If a certain area had a population of 10 million and 500,000 retail stores at the end of 2004, the density index of commercial outlets would be ().
A. 5/thousand people B. 5/100 people
C. 20/person D. 0.2/thousand people
10. Among the marker variation indicators, the simple calculation method is ().
A. Average differenceB. standard deviation
C. Full distance D. standard deviation coefficient
11. The purpose of a sample survey is ()
A. Understand the overall situation of the sampling population B. Use sample indicators to infer all and overall indicators
C. Understand the comprehensive situation of the whole and the population D. Use the whole and the overall indicators to infer the sample indicators
12． Under the same conditions, the average sampling error of repeated sampling is compared with that of non-repeated sampling ()
A. The former must be greater than the latter B. The former must be less than the latter
C. Both are equal D. The former may be greater or less than the latter
13． The basis for dividing the quantitative index index and the quality index index is ().
A. The nature of index indicators is different. B. The scope of objects reflected is different.
C. The characteristics of the phenomena being compared are different. D. The methods of compiling the index are different.
14. If retail price increases by 10% and sales volume decreases by 5%, then sales ().
A. Increased B. Decreased
C. No change D. Unable to judge
15. If the employee wage level of a certain enterprise increases by 10% compared with the previous year, and the number of employees increases by 5%, the enterprise's total wages will increase ().
A.5%B.15%
C.15.5%D.50%
16． The values of various indicators in the dynamic sequence can be added together ().
A. Dynamic sequence of relative numbers B. Dynamic sequence of absolute numbers
C. Period sequence D. Time point sequence
17． The relationship between cumulative growth and period-by-period growth is ().
A. The sum of period-by-period growth is equal to the cumulative growth. B. The product of period-by-period growth is equal to the cumulative growth.
C. The sum of the cumulative increases is equal to the period-by-period increase. D. There is no direct relationship between the two.
18. If the previous level of a certain phenomenon is 15 million tons and the current level is 20 million tons, the absolute value of a 1% increase is ().
A.15 million tons B.150,000 tons
C.1.5 million tons D.50,000 tons
19. The time series of the number of students in a school by year from 2000 to 2005 is ().
A. Period sequence of absolute numbers B. Time point sequence of absolute numbers
C. Relative time series D. Average time series
4. When the absolute value of the linear correlation coefficient is close to 1, it means that the closeness of the correlation between the two variables is ().
A. Perfect correlation B. Weak correlation
C. No linear correlation D. High correlation
2. Multiple-choice questions: (3 points for each question, 15 points in total)
5. The census belongs to ().
A. Comprehensive investigationB. non-comprehensive investigation
C. One-time survey D. regular surveys
E. special investigation
6. Correct statistical grouping should be done ().
A. There are differences between groups B. Groups should be equally spaced
C. The group is homogeneous D. Group limits should not overlap
E. There should be no opening group
twenty three. Those that belong to the grouping by quality mark include ().
A. Employees are grouped by gender B. Students are grouped by health status
C. Enterprises are grouped by economic type D. Enterprises are grouped by number of employees
E. Population grouped by place of residence
twenty four. Among the following indicators, the one that belongs to the period indicator is ().
A. Number of employees at the end of the year B. capital profit rate
C. Product outputD. Product output value
E. Sales revenue
15. Compared with comprehensive survey, the advantages of sampling survey are ()
A. Fast B. Low cost
C. Able to control the error of sampling estimation D. Widely applicable
E. No survey error
3. True or False Questions: (1 point for each question, 10 points in total)
16. A sign is a name that describes the overall characteristics, while an indicator is a concept that describes the overall unit characteristics. ()
17. When using the mass observation method, all units of the research object must be observed and investigated. ()
18. Quality indicators reflect work quality and other contents, so they generally cannot be expressed by numerical values. ()
19. The selection of typical units in typical surveys does not need to follow the random principle. ()
20. Grouping by one mark is simple grouping, and grouping by multiple marks is compound grouping. ()
21. Quality marks are also called variables. There are two types of variables: discrete and continuous. ()
22. The intensity relative index is obtained by comparing two non-homogeneous indicators, and its measurement unit is represented by a complex number. ()
23. When preparing time point series, the intervals between various indicators must be consistent. ()
24. The fixed base development speed is equal to the continuous product of the chain development speeds in the corresponding period. ()
7. When calculating the correlation coefficient, the independent variable and dependent variable should first be determined. ()
4. Short answer questions: (7 points for each question, 14 points in total)
8. What aspects does the statistical survey plan design include?
9. What are the principles for preparing time series?
5. Calculation questions: (Question 38 is 11 points, Question 39 is 10 points, a total of 21 points)
38． The wages of 40 workers in a factory are shown in the table below:
Number of workers grouped by monthly salary
1000 or less6
1000-140010
1400-18005
1800-220014
2200 or more5
Total 40
Based on the above information, try to calculate the average wage of workers in this factory.
39. The inventory data of a certain product of a company in 2011 is as shown in the table below:
Statistical time point: January 1st, March 1st, June 1st, October 1st, December 31st
Product inventory (kg) 300300200400300
Calculate the company's average monthly inventory of this product in 2011.
"Principles of Statistics" test paper answers
one. Multiple choice questions
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2. Multiple choice questions
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three. True or False
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34.√35.×
4. Short answer questions
36. What aspects does the design of a statistical survey plan include?
(1) Clarify the purpose and tasks of the investigation
(2) Determine the investigation objects and investigation units
(3) Formulate survey items and questionnaires
(4) Determine the investigation time and method
(5) Organization and implementation plan for institutional investigation work
10. What are the principles for preparing time series?
(1) The length of time should be consistent
(2) The overall scope should be consistent
(3) Consistency of economic content of indicators
(4) Consistency in terms of indicator calculation methods, measurement units, and calculated prices.
five. Calculation problems
11.The answer is 1620 yuan
12.Answer: 300 kilograms