Answer:
|Z| = | -0.747 | = 0.747 < 1.64 at 5% level of significance
Null Hypothesis is accepted at 5% level of significance
The current advertising campaign for a major soft drink brand would be changed if less than 30 percent of the consumers like it and not be changed
Step-by-step explanation:
<u><em>Step(i):</em></u>-
Given Population proportion P = 30 percentage
P = 0.30
sample proportion
<u><em>Null Hypothesis</em></u> :-
P = 0.30
<u><em>Alternative Hypothesis:-</em></u>
<em>P ≠ 0.30</em>
<u><em>Step(ii)</em></u><em>:-</em>
Test statistic
Z = -0.747
|Z| = | -0.747 | = 0.747
tabulated value Z = 1.64 at 5% level of significance
|Z| = | -0.747 | = 0.747 < 1.64 at 5% level of significance
Null Hypothesis is accepted at 5% level of significance
The current advertising campaign for a major soft drink brand would be changed if less than 30 percent of the consumers like it.