
Chapter 11
390
11D3. Test the hypotheses mentioned below:
H
0
: p
1
– p
2
= 0
H
1
: p
1
– p
2
< 0
Use a = 0.05 and the following information related
to samples:
Sample 1: n
1
= 700 x
1
= 250
Sample 2: n
2
= 800 x
2
= 425
where x is the number of desired characteristics of
interest in the sample.
11.6 HYPOTHESIS TESTING ABOUT TWO POPULATION VARIANCES
(
F
DISTRIBUTION)
A decision maker might want to know the difference in two population variances. For example,
a decision maker may want to know the variances in product quality on account of two different
production processes or the variances in the product characteristics between products manufac- ...