In a survey of 4081 adults. 743 say they have soon a ghost Construct the confide

Question

In a survey of 4081 adults. 743 say they have soon a ghost Construct the confidence interval for the population mean mu. C = 0.95, x bar = 5.7, sigma = 0.3, and n = 50 A 95% confidence interval for mu is () (Round tp two decimal places as needed.) Interpret your results Choose the correct answer below With 99% confidence, It can be said that the population proportion of adults who say they have seen a ghost is between the andpoints of the given co The endpoints of the given confidence interval show that 99% of adults have soon a ghost With 99% confidence can be said that the sample proportion of adults who say they have seen a ghost is between the endpoints of the given. With 99% probability, the population proportion of adults who say they have not seen a ghost is between the endpoints of the given confidence

Explanation / Answer

The sample proportion is p=743/4081=0.18

The 99% confidence interval is:

p+/-z(0.99)*root over p(1-p)/n

=0.18+/-2.58*root over 0.18*(1-0.18)/4081

=(0.18+/-0.015)

=(0.165,0.195)

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