Concept explainers
To identify the mean and standard deviation for 95% confidence interval that would estimate the true difference in the proportions Population A and Population B:
Answer to Problem 8PT
Explanation of Solution
Given information:
Where
Also
The formula for 95% confidence interval for true difference in the population proportion
Where
Calculation:
From the confidence interval mean and standard deviation of the sampling distribution of population proportion difference Population A- Population B is given by
Hence mean and standard deviation of the sampling distribution of (Population A-Population B) is
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