A telemarketing company wants to compare the effectiveness of five of its employees by looking at the percentage of survey questions completed.Data from four past surveys are randomly chosen for each of the employees,and the percentage of completed questions is calculated.How many degrees of freedom does the treatment sum of squares have? How about the error sum of squares?
A)df-treatment = 5; df-error = 19
B)df-treatment = 4; df-error = 19
C)df-treatment = 4; df-error = 15
D)df-treatment = 4; df-error = 16
E)df-treatment = 5; df-error = 15

Question

Quizplus · Accepted Answer

The degrees of freedom for the treatment sum of squares is the number of groups (employees) minus 1, which is 5 - 1 = 4. The degrees of freedom for the error sum of squares is the total number of observations minus the number of groups, which is (5 employees * 4 surveys) - 5 = 20 - 5 = 15.

A Telemarketing Company Wants to Compare the Effectiveness of Five