A doctor is interested in whether the effectiveness of a new

A doctor is interested in whether the effectiveness of a new advertising program that encourages more exercise is impacted by gender (i.e., male versus female) or socioeconomic status (SES), which has been categorized into low, medium, and high groups. After the advertising has been in place for a year, the doctor asks study participants about the average amount of weekly exercise they have engaged in for the past three months. She uses a fully-crossed design so that she randomly surveys 21 subjects from each of the gender-SES conditions.

Complete the degrees of freedom for each entry in the ANOVA table:

Source	df
Gender
SES
Gender*SES
Error
Total

Solution

Source df Gender 1 SES 2 Gender*SES 18 Error 104 Total 125