0.1 Review exercises (ch 3-13)  (Page 30/12)

These review exercises are designed to provide extra practice on concepts learned before a particular chapter. For example, the review exercises for Chapter 3, cover material learned in chapters 1 and 2.

Chapter 3

Use the following information to answer the next six exercises: In a survey of 100 stocks on NASDAQ, the average percent increase for the past year was 9% for NASDAQ stocks.

1 . The “average increase” for all NASDAQ stocks is the:

1. population
2. statistic
3. parameter
4. sample
5. variable

2. All of the NASDAQ stocks are the:

1. population
2. statistics
3. parameter
4. sample
5. variable

3. Nine percent is the:

1. population
2. statistics
3. parameter
4. sample
5. variable

4. The 100 NASDAQ stocks in the survey are the:

1. population
2. statistic
3. parameter
4. sample
5. variable

5. The percent increase for one stock in the survey is the:

1. population
2. statistic
3. parameter
4. sample
5. variable

6. Would the data collected by qualitative, quantitative discrete, or quantitative continuous?

Use the following information to answer the next two exercises: Thirty people spent two weeks around Mardi Gras in New Orleans. Their two-week weight gain is below. (Note: a loss is shown by a negative weight gain.)

7. Calculate the following values:

1. the average weight gain for the two weeks
2. the standard deviation
3. the first, second, and third quartiles

8. Construct a histogram and box plot of the data.

Chapter 4

Use the following information to answer the next two exercises: A recent poll concerning credit cards found that 35 percent of respondents use a credit card that gives them a mile of air travel for every dollar they charge. Thirty percent of the respondents charge more than $2,000 per month. Of those respondents who charge more than $2,000, 80 percent use a credit card that gives them a mile of air travel for every dollar they charge.

9. What is the probability that a randomly selected respondent will spend more than $2,000 AND use a credit card that gives them a mile of air travel for every dollar they charge?

1. (0.30)(0.35)
2. (0.80)(0.35)
3. (0.80)(0.30)
4. (0.80)

10. Are using a credit card that gives a mile of air travel for each dollar spent AND charging more than $2,000 per month independent events?

1. Yes
2. No, and they are not mutually exclusive either.
3. No, but they are mutually exclusive.
4. Not enough information given to determine the answer

11. A sociologist wants to know the opinions of employed adult women about government funding for day care. She obtains a list of 520 members of a local business and professional women’s club and mails a questionnaire to 100 of these women selected at random. Sixty-eight questionnaires are returned. What is the population in this study?

1. all employed adult women
2. all the members of a local business and professional women’s club
3. the 100 women who received the questionnaire
4. all employed women with children

Use the following information to answer the next two exercises: The next two questions refer to the following: An article from The San Jose Mercury News was concerned with the racial mix of the 1500 students at Prospect High School in Saratoga, CA. The table summarizes the results. (Male and female values are approximate.) Suppose one Prospect High School student is randomly selected.