1) When all possible differences between pairs of population means are evaluated
ID: 3133389 • Letter: 1
Question
1) When all possible differences between pairs of population means are evaluated not with an F test, but with a series of regular t tests, the probability of at least one
a) type I error is larger than the specified level of significance.
b) type I error is smaller than the specified level of significance.
c) type II error is smaller than the specified level of significance.
d) type II error is larger than the specified level of significance.
2) Tukey's test should be used only if
a) the overall null hypothesis is retained.
b) the overall null hypothesis is rejected.
c) analysis of variance is used.
d) an F test is used.
3) Tukey’s HSD controls the
a) probability of a type I error.
b) probability of a type II error.
c) cumulative probability of a type I error.
d) cumulative probability of a type II error
4) If a published report of an F test specified that p <.01, you could conclude that the test result is
a) rare, supporting the null hypothesis.
b) rare, supporting the research hypothesis.
c) common, supporting the null hypothesis.
d) common, supporting the research hypothesis.
Explanation / Answer
Answers are given below :
1) b) type I error is smaller than the specified level of significance.
2) c) analysis of variance is used.
3) a) probability of a type I error.
4) d) common, supporting the research hypothesis.
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