Question 1) A poll is planned to determine wha

1) 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. Errors due to interviewer bias and selection bias

B. Sampling errors only

C. Only non-sampling errors

D. Sampling errors and errors due to selection bias

2) A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developed breast cancer. According to the American Cancer Society, one in twelve women will develop breast cancer at some time in her life. Of the numbers mentioned, which are parameters?

A. 13% and one in twelve

B. 79% and one in twelve

C. 79% and 500 days

D. 13% and 79%

3) What is the difference between probability sampling and simple random sampling?

A. Probability sampling is a type of simple random sample.

B. In probability sampling each item has an identical chance of being chosen.

C. Simple random sampling is a type of probability sampling.

D. There is no difference.

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

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

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

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

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

5) Which of the following statements is false?

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

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

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

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

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

A. Communicates well (both written and oral)

B. Can deal with imperfect information

C. Adapts answers to client desires

D. Technically current (e.g. software)

7) If terms such as positive, negative, more than, and less than, are used, then these hypotheses are_________.

A. alternative hypotheses

B. nondirectional hypotheses

C. null hypotheses

D. directional hypotheses

8) The manipulation of the independent variable is known as the ________.

A. validity

B. experimental test

C. randomization

D. treatment

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

A. design

B. quality control

C. ability to find friendly survey respondents

D. pilot or beta test

10) Which of these is NOT an acceptable type of survey question?

A. ranking questions

B. leading question

C. pictograms

D. Likert scale

11) Which of these is NOT an acceptable type of survey question?

A. Closed ended

B. Prejudicial or biased questions

C. Fill in the blank

D. Open ended

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

A. Use of sound methodology

B. Monetary compensation

C. Informed consent

D. Protection of confidentiality

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

A. Maintain data accuracy

B. Conceal financial support

C. Accurate reporting of procedures

D. Accepted procedures are followed

14) Which of the following is not an ethical concern for the statistical researcher?

A. Inhumane treatment of animals

B. Cite sources

C. Manipulation of data

D. Privacy of privacy

15) The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. The 10 female students in the class averaged

A. 80

B. 70

C. 75

D. 85

16)

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