Steve HousemanPage 111/5/2018

W4- Individual Quiz (Chapter 15, and 16 of E-text)

Name: ______Total Points: = 4.0

Instruction: This quiz consists of eight (8) multiple choice question. Each question is worth one-half point. Please highlight one letter only A, B, C, or D as your best choice.Please submit as attachment to your individual forum under appropriate thread by midnight, (MST), Monday, Day (7) of Week Four.

1. Which of these statements concerning a chi-square goodness-of-fit test is correct?

A) Data may be of nominal scale.

B) Population must be normal.

C) All the expected frequencies must be equal.

D) All of the above are true

2. The table below is a tabulation of opinions of employees of Axolotl Corporation, who were sampled at random from pay records and asked to complete an anonymous job satisfaction survey.

Assuming independence, the expected frequency of satisfied hourly employees is

A) 80

B) 90

C) 75

D) None of these

3. We sometimes combine two categories in a chi-square test if

A) the number of observed frequencies is less than 15.

B) the number of observed frequencies is more than 5.

C) the number of expected frequencies is less than 5.

D) the number of expected frequencies is more than 5.

.

4. A taste test of randomly selected students was conducted to see if there was a difference in preferences among four popular drinks. The results are:

Using = .025, the critical value of the test you would use in determining whether there is a preference among the drinks is

A) 5.99

B) 7.38

C) 9.35

D) 11.07

5. Which nonparametric test is analogous to a parametric two-sample t-test for means?

A) Kruskal-Wallis test.

B) Wilcoxon signed rank test.

C) Mann-Whitney test.

D) Wald-Wolfowitz test.

6. Which parametric test resembles the nonparametric Spearman’s rank test?

A) t-test of a correlation coefficient.

B) t-test of two sample means.

C) t-test of one sample mean.

D) None of the above.

7. Twelve customers are randomly chosen and each is given a sample of Nut Butter ice cream to taste. The customers rank the taste of the ice cream on a 15 point scale. They are then given a sample of Chewy Gooey ice cream to taste and rank on a 15 point scale. Based on the ratings, the research analyst conducting the survey wishes to determine if one flavor is preferred over the other. Which nonparametric test would you use to determine if there is a difference in the ratings.

A) Wald-Wolfowitz test. B) Wilcoxon signed rank test.

C) Mann-Whitney test. D) Kruskal-Wallis test.

8. Northwest Airlines wants to determine if the number of no-shows for flights originating from Detroit are higher than Minneapolis. A sample of twelve flights from each city is taken and the number of no-shows is determined for each flight. Which nonparametric test would you use to determine if no-shows are greater in Detroit?

A) Wald-Wolfowitz test. B) Wilcoxon signed rank test.

C) Mann-Whitney test. D) Kruskal-Wallis test.