In which of the following instances is a post hoc test needed in a one-factor
within-subjects analysis of variance?
a. A statistically significant Fobs is obtained with two levels of an independent
variable.
b. A nonsignificant Fobs is obtained with two levels of an independent variable.
c. A nonsignificant Fobs is obtained with five levels of an independent variable.
d. A statistically significant Fobs is obtained with four levels of an independent
variable.
Question 2
If the alternative hypothesis is accepted in a one-factor within-subjects analysis of
variance on three levels of the independent variable, then _____ .
a. it may be concluded that the three treatment means were obtained from
populations with identical means
b. it may be concluded that the treatment means are not equal to the population means
c. it may be concluded that the variance of the sample is not equal to the variance of the
population
d. multiple comparison tests are needed to find statistically significant pairwise
differences of the treatment means
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