In the finding the critical value for the Wilcoxon signed rank test, what does n represent?
A) The number of observations in the sample
B) The number of pairs
C) The number of nonzero deviations
D) The number of positive ranks
Q. 2The General Electric service department believes that the median time for a service call should be 30 or fewer minutes. To test this, the following random sample of service times was collected:
Time
33
27
40
34
22
19
40
73
26
Given that the managers do not wish to make the assumption that the population is normally distributed, the appropriate statistical test for testing about service times is:
A) the t-test.
B) the Kruskal-Wallis test.
C) the Wilcoxon signed rank sum test.
D) the F-test.
Q. 3The Wilcoxon signed rank test is used to test which of the following type of hypotheses?
A) Tests about a single population median
B) Tests involving three or more population medians
C) Tests about the variances of two or more populations
D) Tests about two or more population proportions
Q. 4Which of the following is not a step involved in the Wilcoxon signed rank test?
A) Find the deviations from the hypothesized median
B) Rank the deviations
C) Convert the deviations to absolute values
D) Find the deviations from the sample median
Q. 5Nonparametric statistical tests are used when:
A) the sample sizes are small.
B) we are unwilling to make the assumptions of parametric tests.
C) the standard normal distribution cannot be computed.
D) the population parameters are unknown.
Q. 6If you are interested in testing whether the median of a population is equal to a specific value, an appropriate test to use is:
A) the Mann-Whitney U test.
B) the t-test.
C) the Wilcoxon signed rank test.
D) the Wilcoxon Matched-Pairs Signed Rank test.
Q. 7Kruskal-Wallis One-Way Analysis of Variance is the nonparametric counterpart to the one-way ANOVA procedure in which the assumptions of normally distributed populations with equal variances are satisfied.
Indicate whether the statement is true or false
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