
Chapter 11
PB
Statistical Inference: Hypothesis Testing for Two Populations
395
FIGURE 11.31
Minitab output for
Example 11.5
12E1. Test the hypotheses mentioned below:
H
H
01
2
2
2
11
2
2
2
:
:
=
≠
Use a = 0.05 and the following information related
to samples:
Sample 1: n
1
= 10 s
1
2
85=
Sample 2: n
2
= 13
s
2
2
165=
Assume that the populations are normally
distributed.
12E2. Test the hypotheses mentioned below:
H
H
01
2
2
2
11
2
2
2
:
:
=
<
Use a = 0.10 and the following information related
to samples:
Sample 1: n
1
= 9
s
1
2
70=
Sample 2: n
2
= 15
s
2
2
120=
Assume that the populations are normally
distributed.
SELF-PRACTICE PROBLEMS
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