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RES 341 Final Exam THE NEW EXAM 12Questions

RES 341 Final Exam THE NEW EXAM 12Questions

1) When every member of a population has the chance of being selected based on the probability, or frequency, of its representation in that population, you are using which type of sampling?

A. Convenience sample

B. Census sample

C. Quota sample

D. Random sample

2) A survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?

A. Simple random sample

B. Cluster sample

C. Systematic sample

D. Stratified sample

3) A poll is planned to determine what proportion of all students favor an increase in fees to support a new track and field stadium. A questionnaire will be published and the first 1000 completed questionnaires will be analyzed. Which of the following errors will be associated with the sample?

A. Sampling errors only

B. Sampling errors and errors due to selection bias

C. Only non-sampling errors

D. Errors due to interviewer bias and selection bias

4) Which of the following statements is false?

A. Statistical inference is the process of making a prediction based on only a small piece of information.

B. A summary measure calculated from all items of interest is a parameter.

!C. The main goal of descriptive statistics is to estimate characteristics of populations.

D. A summary measure calculated from some of the items of interest is a statistic.

5) Which of the following is NOT a characteristic of an ideal statistician?

A. Can deal with imperfect information

B. Adapts answers to client desires

C. Technically current (e.g. software)

D. Communicates well (both written and oral)

6) Which of the following is an example of statistical inference?

A. Calculating the amount of fly spray needed for your orchard next season.

B. Calculating the mean age of patients discharged from hospitals in New York State in 1997.

C. Counting the number of patients who file malpractice suits after being discharged from hospitals in New York State.

D. Calculating the mean number of fruit trees damaged by Mediterranean fruit flies in California last year.

7) The _________ states that the population correlation between two variables is equal to zero or that the difference in the means of two groups in the population is equal to zero.

A. nondirectional hypothesis

B. null hypothesis

C. directional hypothesis

D. alternative hypothesis

8) The _________ variable causes the variance or impacts the dependent variable.

A. moderating

B. intervening

C. dependent

D. independent

9) Which of the following is NOT a basic step in conducting a survey?

A. Develop a budget

B. Secure financing for the survey

C. Create a research design

D. State the goals

10) Which of the following is NOT a potential source of survey error?

A. Interviewer error

B. Measurement error

C. Standard error

D. Coverage error

11) Name the item that is NOT a recognized survey guideline.

A. quality control

B. ability to find friendly survey respondents

C. pilot or beta test

D. design

12) Which of the following is NOT an ethical concern for the statistical researcher?

A. Monetary compensation

B. Informed consent

C. Protection of confidentiality

D. Use of sound methodology