Us travel data center survey of 1500 adults found that 42% of respondents stated that they favor historical sites. Find the 95% confidence interval of the true proportion of all adults who favor visiting historical sites.

Answer 1

Use a proportional confidence interval formula:

CI95 = p + or - (1.96)(√pq/n)

Note: + or - 1.96 represents 95% confidence interval.

For p in your problem: .42
For q: 1 - p = 1 - .42 = .58
n = 1500

I let you take it from here to calculate the interval.

Answer 2

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