To check: Whether this confidence interval could be used to say that the proportion of U.S adults who are in favor of weight loss is different from 0.55.
Answer to Problem 54E
Yes, it could be concluded that proportion of U.S adults who are in favor of weight loss is different from 0.55.
Explanation of Solution
Given:
Margin of error ( E ) = ±3% = 0.03
Point estimate
Formula used:
The formula to compute the confidence interval is:
Calculation:
The confidence interval is computed as follows:
Thus, the required confidence interval is
Conclusion:
Since, 0.55 does not lie in the above computed confidence interval. Thus, it can be concluded that the proportion of U.S adults who are in favor of weight loss is different from 0.55.
Chapter 9 Solutions
The Practice of Statistics for AP - 4th Edition
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