Group 1: Married and living in school accommodations
Group 2: Single and living in school accommodations
Group 3: Married and living in own accommodations
Group 4: Single and living in own accommodations.
He has chosen a power of .80 and has decided upon a medium effect size (basing both decisions on what is common in most social science studies; he could have also researched past studies on a similar topic and chosen an effect size this way). According to the statistical table in the appendix of Steven’s (2009) book, this researcher would require 50 participants per group (200 participants in total) in order for his study to produce statistically significant results.