Solution:
Given in the question
Null hypothesis H0: p = 0.7
Alternate hypothesis Ha: p
0.7
This is a two-tailed test
alpha = 0.05 and alpha/2 for lower tail= 0.025 and alpha/2 for
upper tail = 0.975
So critical region from Z table is +/-1.96
We will reject H0. if test statistic Z is greater than 1.96 or less
than -1.96 and cannot reject H0 Otherwise. So its correct answer is
D.
5 In a hypothesis test for a proportion, the null hypothesis is HO: p = 0.7...
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