Suppose a study estimated that 58% of the residents of a town (with an error range of ±8 percentage points at 95% confidence) favor expanding the park and recreation department. which of the following percentages of the town's residents may favor expanding the park and recreation department?
a. 92%
b. 82%
c. 52%
d. 72%

The correct answer to this question is letter "C. 52%." 

If the confidence interval is 58±8, then your lower bound is 58−8=50 and the upper bound is 58+8=66. So, you should expect to find a value between 50 and 66 to be a value you need. So the percentage of the town's residents may favor expanding the park and recreation department is 52%.

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