第一章测试1.Michael Bayley, Marketing Director of UniPower’s Electrical Division, is leading a study to identify and assess the relative importance of product features. Michael directs his staff to design a survey questionnaire for distribution to all of UniPower’s 954 customers. For this study, the set of 954 customers is a ________________.
A: sample B:population C:statistic D:parameter
答案:B
2.Claudia Taylor, Director of Global Industrial Sales in Melbourne, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1500 but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 40 industrial customers. For this study, the set of 40 industrial customers is a _______.
A:parameter B:statistic C:sample D:population
答案:C
3.A politician who is running for the office of premier in a state with 3 million registered voters commissions a survey. In the survey, 53.6% of the 5000 registered voters interviewed say they plan to vote for him. The population of interest is the
A:3 million registered voters in the state. B:53.6 % of, or 2680, voters interviewed who plan to vote for him C:5000 registered voters interviewed. D:46.4% of, or 2320, voters interviewed who plan not to vote for him
答案:A
4.Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a ___________________.
A:statistic B:sample C:parameter D:population
答案:C
5.A summary measure that is computed from a sample to describe a characteristic of the population is called
A:a population B:Both A and C are correct, since they are the same C:a parameter D:a statistic
答案:D
6.Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ________________.
A:parameter B:population C:sample D:statistic
答案:D
7.Descriptive statistics deals with methods of
A:presenting data in a convenient and informative way B:summarising data C:doing all of the above D:organising data.
答案:C
8.Which of the following statements is not true?
A:One form of descriptive statistics uses numerical techniques B:One form of descriptive statistics uses graphical techniques C:In the language of statistics, the term population refers to a group of people D:Statistical inference is used to draw conclusions or inferences about characteristics of populations based on sample data
答案:C
9.A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ___________________.
A:wishful thinking B:nonparametric statistics C:inferential statistics D:descriptive statistics
答案:C
10.Which of the following is not the goal of descriptive statistics?
A:Estimating characteristics of the population B:Summarising data C:Reporting numerical findings D:Displaying aspects of the collected data
答案:A
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