2020 商务统计(吉林师范大学) 最新满分章节测试答案

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本课程起止时间为:2020-03-30到2020-06-30
本篇答案更新状态:已完结

第一章 什么是统计学 第一单元测试

1、 问题:The general process of gathering, organizing, summarizing, analyzing, and interpreting data to assist in making effective decisions is called:
选项：
A:statistics.
B:descriptive statistics.
C:inferential statistics.
D:levels of measurement.
答案: 【statistics.】

2、 问题:A sample is:
选项：
A:at least 15 observations.
B:a group of people.
C:part of a population.
D:a set of frequencies.
答案: 【part of a population.】

3、 问题:The main purpose of inferential statistics is to:
选项：
A:summarize data in a useful and informative manner.
B:estimate population characteristics based on a sample information.
C:determine if the data adequately represents the population.
D:gather or collect data.
答案: 【estimate population characteristics based on a sample information.】

4、 问题:To study the characteristics of loan applicants, a random sample of 50 loan applicants is selected and their annual incomes are obtained. Which level of measurement is annual income?
选项：
A:Nominal
B:Ordinal
C:Interval
D:Ratio
答案: 【Ratio】

5、 问题:The main purpose of descriptive statistics is to:
选项：
A:summarize data in a useful and informative manner.
B:estimate a population characteristic based on a sample.
C:determine if the data adequately represents the population.
D:gather or collect data.
答案: 【summarize data in a useful and informative manner.】

6、 问题:A bank asks customers to evaluate the quality of drive-through service as good, average, or poor. Which level of measurement is used to measure service quality?
选项：
A:Nominal
B:Ordinal
C:Interval
D:Ratio
答案: 【Ordinal】

7、 问题:The main purpose of descriptive statistics is to:
选项：
A:summarize data in a useful and informative manner.
B:estimate a population characteristic based on a sample.
C:determine if the data adequately represents the population.
D:gather or collect data.
答案: 【summarize data in a useful and informative manner.】

8、 问题:Gallup political polls ask people their political party affiliation – Democrat, Republican or Independent. Which level of measurement is used to measure party affiliation?
选项：
A:Nominal
B:Ordinal
C:Interval
D:Ratio
答案: 【Nominal】

9、 问题:What type of variable is: number of car accidents reported in your city?
选项：
A:Attribute
B:Continuous
C:Discrete
D:Qualitative
答案: 【Discrete】

10、 问题:Data measured with an ordinal scale:
选项：
A:can be ranked.
B:have a meaningful value of zero.
C:have meaningful differences between values.
D:are quantitative.
答案: 【can be ranked.】

第二章 Chapter 2 Describing Data： Frequency Tables, Frequency Distributions, and Graphic Presentation 第

1、 问题:In a frequency distribution the classes must:
选项：
A:be mutually exclusive.
B:have a maximum of 10 observations.
C:have equal frequencies.
D:be measured on a nominal scale.
答案: 【be mutually exclusive.】

2、 问题:For a frequency distribution, the class interval is:
选项：
A:the class frequencies divided by two.
B:the class frequency divided by the number of observations.
C:the difference between consecutive lower class limits.
D:the number of observations in the class.
答案: 【the difference between consecutive lower class limits.】

3、 问题:For a frequency distribution, a class frequency is:
选项：
A:the number of observations in the class.
B:the difference between consecutive lower class limits.
C:limited to a maximum of 10 observations.
D:the total number of observations in the sample.
答案: 【the number of observations in the class.】

4、 问题:A research organization is studying the selling price of laptop computers. They selected 25 different computers for the study. To summarize the selling price with a frequency distribution and using the 2k rule, how many classes would you recommend?
选项：
A:10
B:25
C:4
D:5
答案: 【5】

5、 问题:For a frequency distribution, the class midpoint is:
选项：
A:the class interval divided by two and added to the lower limit.
B:the difference between consecutive lower limits.
C:the number of observations in the class.
D:the class frequency divided by the number of observations.
答案: 【the class interval divided by two and added to the lower limit.】

6、 问题:Which of the following is not a guideline for a frequency distribution?
选项：
A:Avoid open-ended classes.
B:Use the 2k rule to determine the number of classes.
C:Make the lower limit of the first class a multiple of the class interval.
D:Each class should have more than 5 observations.
答案: 【Each class should have more than 5 observations.】

7、 问题:To convert a frequency distribution to a relative frequency distribution:
选项：
A:find the difference between consecutive lower class limits.
B:divide the class frequency by the total number of observations.
C:divide the lower limit of the first class by the class interval.
D:multiple the class frequency by 100.
答案: 【divide the class frequency by the total number of observations.】

8、 问题:A pie chart shows:
选项：
A:the frequency for each class.
B:the relative frequency for each class.
C:trends in the data.
D:the class midpoints.
答案: 【the relative frequency for each class.】

9、 问题:The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.                                                 Relative            Time (in Minutes)        Frequency                 0 but less than 5          0.37            5 but less than 10        0.22            10 but less than 15      0.15            15 but less than 20      0.10            20 but less than 25      0.07            25 but less than 30      0.07            30 or more                   0.02 Referring to the table, if 1,000 calls were randomly sampled, how many calls lasted under 10 minutes?
选项：
A:220
B:370
C:410
D:590
答案: 【590】

10、 问题:In a cumulative frequency polygon:
选项：
A:the class frequencies are converted to percents.
B:the cumulative frequency for the first class limit is zero.
C:we add the class frequencies starting with the first class.
D:all of the above.
答案: 【all of the above.】

第一章 什么是统计学 补充测试

1、 问题:The general process of gathering, organizing, summarizing, analyzing, and interpreting data to assist in making effective decisions is called:
选项：
A:statistics
B:descriptive statistics
C:inferential statistics
D:levels of measurement
答案: 【statistics】

2、 问题:A sample is:
选项：
A:at least 15 observations
B:a group of people
C:part of a population
D:a set of frequencies
答案: 【part of a population】

3、 问题:The main purpose of inferential statistics is to:
选项：

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