Posted: December 21st, 2016

1. The comparison distribution for a t test for independent means is a:

Distribution of differences between means

Z distribution ( a normal curve)

Distribution of difference scores

Distribution of proportional variance scores

2. Consider a study in which the population variance estimate based on treatment group of 14 participants is 8, and the population variance estimate based on a control group of 17 individuals is 9. Compute the pooled estimate of population variance.

7.25

8.55

9.22

10.05

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