Chapter 12 Problem # 13
Part (a)
Observed Frequencies
Health
Insurance
Size of
Company
Yes
No
Total
Small
36
14
50
Medium
65
10
75
Large
88
12
100
Total
189
36
225
Expected Frequencies
Health Insurance
Size of Company
Yes
No
Total
Small
42
8
50
Medium
63
12
75
Large
84
16
100
Total
189
36
225
Chi Square
Health Insurance
Size of Company
Yes
No
Total
Small
.86
4.50
5.36
Medium
.06
.33
.39
Large
.19
1.00
1.19
X
2
=
6.94
Degrees of freedom = (3-1) (2-1) = 2
Using the X
2
table with degree of freedom = 2, X
2
= 6.94 shows the p-value is between
.025 and .05.
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