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To find: The 95% confidence interval for the differences in the proportion of white and young people who listen rap daily.
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Answer to Problem 12E
The confidence interval is (0.1959, 0.3641)
Explanation of Solution
Given:
Formula used:
The formula to compute the confidence interval for difference in population proportions is:
Calculation:
The 95% confidence interval using Ti-83 plus calculator is computed as:
Thus, the confidence interval is (0.299, 0.403)
Interpretation:
Thus, it could be interpreted that there is 90% probability that the difference in the proportion of young people that listen rap daily lies between 0.299 and 0.403.
Chapter 10 Solutions
The Practice of Statistics for AP - 4th Edition
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