chapter 17 mr
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