Answer 15-17

QUESTION 15 What is the pooled standard deviation of the two groups? The pooled standard deviation is $29.56. The pooled standard deviation is $30.92. The pooled standard deviation is $31.20 The pooled standard deviation is $32.12. QUESTION 16 What is the effect size of the difference between the two groups? (Report the absolute value.) O d =.05 O d=.38 O d=.25 Od= .09 QUESTION 17 Based on Cohen's criteria, how large is the observed effect? Is it practically significant? It should be considered a medium effect. The difference between the means is not practically significant. It should be considered a small effect. The difference between the means is practically significant. It should be considered a medium effect. The difference between the means is practically significant. It should be considered a small effect. The difference between the means is not practically significant. 2 72 182 JUN 1 C itv