Chapter 13, Problem 33P

Use the following information to answer the next seven exercises. A video game developer is testing a new game on three

different groups. Each group represents a different target market for the game. The developer collects scores from a random

sample from each group. The results are shown in Table 13.16

Group A	Group B	Group C
101	151	101
108	149	109
98	160	198
107	112	186
111	126	160

Table 13.16

What is the df(num)?