
Chapter 13
490
13B1. Use the following contingency table to test whether
variable 1 is independent of variable 2. Take a=0.05.
Variable 1
Variable 2
20 40 52
23 43 45
34 37 38
13B2. Use the following contingency table to test whether
variable 1 is independent of variable 2. Take a=0.01.
Variable 1
Variable 2
105 110 120 125
100 95 103 112
110 98 92 105
95 98 103 107
SELF-PRACTICE PROBLEMS
FIGURE 13.9
Minitab output for
Example 13.4
M13 Buisiness Statistics xxxx 13.indd 490 6/17/2020 11:48:17 AM