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Concept explainers
a.
To show: The test procedure that is to be used here.
a.
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Explanation of Solution
Given:
Before and after conditions are involved
In this case, two samples of smoker are involved which have been used to make the comparison in two different periods The same number of smokers are involved in each sample and the condition of before and after is fulfilling here.
Thus, the appropriate test is paired t -statistic.
b.
To show: The test procedure that is to be used here.
b.
![Check Mark](/static/check-mark.png)
Explanation of Solution
Given:
Here, it is required to find out the percentage of senior citizens who are attending a play one or more year than who are not attending.
The z- test for two sample proportions is one of the statistical techniques that is used to find out if there is a difference in proportions of the two samples or not. Here, it is required to find out the percentage of senior citizens who are attending a play one or more year than who are not attending.
Thus, the appropriate test is two sample z test.
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