chapter 17 mr

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24. The critical values for a two-tailed z-test, given a significance level of 0.05, would be ______.

a. -1.96 and 1.96

19. Procedures for examining differences between more than two means are called _____.

a. Analysis of variance

16. Which would be the appropriate way to test differences in proportions for more than two samples?

a. Cross-tabulation procedure to conduct a chi-square test

18. In one-way ANOVA, separation of the variation observed in the dependent variable into the variation due to the independent variables plus the variation due to error is called _____.

a. Decomposition of the total variation

5. _______ in ANOVA indicates that some differences exist between some of the treatment groups.

a. Decomposition of the total variation

23. In its simplest form, ANOVA must have a(n) ______ that is metric.

a. Dependent variable

12. The critical value for a one-tailed z-test, given a significance level of 0.05, would be _____.

a. Either -1.645 or 1.645

3. A frequency distribution that depends on two sets of degrees of freedom is called a(n) ______.

a. F distribution

22. The null hypothesis of equal means for more than two samples is tested by a(n) _____, which is the ratio of the mean square related to the independent variable to the mean square related to error.

a. F statistic

2. A(n) ______ of sample variance may be performed if it is not known whether the two population have equal variance.

a. F-test

11. The categorical independent variables used in an analysis of variance are called _____.

a. Factors

7. If the probability of F is greater than the significance level alpha, _____ and _____ should be used.

a. Ho is rejected: t based on "equal variances not assumed"

9. In the case of conducting the t-test on the means of two samples of observations, the samples can be ____ or ____.

a. Independent; random

21. An ANOVA technique in which there is only one factor is called

a. One-way analysis of variance

15. In many marketing research applications, the obervations for two groups are not selected from independent samples. Rather, the observations relate to _____ in that the two sets of observations relate to the same respondents.

a. Paired samples

8. ______ tests provide inferences for making statements about the means of parent population

a. Parametric

4. _______ are hypothesis testing procedures that assume the variables of interest are measured on at least an interval scale.

a. Parametric test

10. A univariate hypothesis test using the t distribution, which is used when the standard deviation is unknown and the sample size is small, is called the _____.

a. T-test

1. Which statement is not true concerning the t distribution?

a. The T distributions are skewed to the left.

6. Examples of hypotheses related to paired samples include all of the following EXCEPT:

a. The new service plan will be preferred by at least 70 percent of the customers.

20. Which of the following is NOT an example of a statement that is about a single variable against a known or given standard?

a. The proportion of households with an internet connection in the United States exceeds the proportion of those in Germany

17. The t statistic is calculated by assuming that all of the following exists EXCEPT:

a. The sample size is large.

13. Independent vairables must be all _____ to use an ANOVA

a. nonmetric

14. A _____ is a univariate hypothesis test using the standard normal distribution.

z test


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