GATE Humanities and Social Sciences - Psychology Practice Quiz

Question 1

In a one-way ANOVA comparing mean anxiety scores across four therapy groups, the null hypothesis tested by the omnibus F-ratio is that

Accepted Answer

all four population means are equal

Question 2

In ANOVA, the F statistic is computed as

Accepted Answer

between-group variance divided by within-group variance

Question 3

A one-way ANOVA yields SS_between = 36 with df_between = 3, and SS_within = 48 with df_within = 16. What is the F statistic?

Accepted Answer

4.00

Question 4

When the homogeneity of variance assumption is seriously violated and group sizes are unequal, which follow-up approach is generally more appropriate than Tukey's HSD after a heteroscedastic omnibus test?

Accepted Answer

Games-Howell procedure

Question 5

Which statement best explains why conducting many pairwise t-tests after ANOVA without adjustment is problematic?

Accepted Answer

It increases the probability of at least one Type I error across the set of comparisons

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