
Chapter 13
PB
Hypothesis Testing for Categorical Data (Chi-Square Test)
485
Step 7: Arrive at a statistical conclusion and business implication
At 95% con dence level, the critical value obtained from the chi-square table is χ
0056
2
12 59
.,
=
c
2
is calculated as 7.23, which is less than the tabular value and falls in the acceptance region.
Hence, the null hypothesis is accepted and the alternative hypothesis is rejected.
There is enough evidence to indicate that brand preference is independent of age group. So,
the management can go in for a uniform sales and marketing policy.
13.4.1 Using Minitab for Hypothesis Testing with
χ
2
Statistic for ...