A researcher investigates the effects of 5 levels of frustration (Factor A) and low vs high amounts of sleep deprivation (Factor B) on depression scores. There were 5 participants per group and she obtained the following SS. Source SS df MS F Between groups X X X Factor A 22.69 ___ _______ ______ Factor B 46.02 ___ _______ ______ Interaction 6.13 ___ _______ ______ Within groups 109.25 ___ _______ X Total 184.09 X X a. Complete the ANOVA summary table with df, MS, F’s. b. Using the .05 level find critical F values for Factor A: df = __,__ CV = _______ for Factor B: df = __,__ CV = _______ and for AxB Interaction: df = __,__ CV = _______ c. Determine which of the 3 effects tested are significant. List the results: A sig? B sig? AxB Int sig?
. A researcher investigates the effects of 5 levels of frustration (Factor A) and low vs high amounts of sleep deprivation (Factor B) on depression scores. There were 5 participants per group and she obtained the following SS.
Source SS df MS F
Between groups X X X
Factor A 22.69 ___ _______ ______
Factor B 46.02 ___ _______ ______
Interaction 6.13 ___ _______ ______
Within groups 109.25 ___ _______ X
Total 184.09 X X
a. Complete the ANOVA summary table with df, MS, F’s.
b. Using the .05 level find critical F values for Factor A: df = __,__ CV = _______
for Factor B: df = __,__ CV = _______
and for AxB Interaction: df = __,__ CV = _______
c. Determine which of the 3 effects tested are significant. List the results: A sig? B sig? AxB Int sig?
d. Compute effect size (eta-sq) for each significant factor found and include them in your conclusion.
e. Write a conclusion - a sentence or 2 - to report the significance and the APA stats. As always, mention the IV and DV in the conclusion and don’t mention “reject the null” or the critical values.
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