A Telemarketing Company Wants to Compare the Effectiveness of Five

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.

A) the alternative that not all survey mean percentages are equal
B) the alternative that all survey mean percentages are equal
C) the alternative that all employee mean percentages are equal
D) the alternative that employee and survey mean percentages are equal
E) the alternative that not all employee mean percentages are equal