Question

The Forest Service took a random sample of Yellowstone Park visitors and asked if they favor restrictions on the number of vehicles allowed to enter the park: 89 of 150 say yes.
    a) Give a 95% confidence interval for the proportion of all Yellowstone visitors who favor the restrictions.
        Include p^ ,  and the Margin of Error.
    b) Are you 95% confident that more than half are in favor? Explain.
c)   What sample size would be needed to obtain a margin of error of 4%

Answer 1

Given :

x = 89

n = 150

sample size is 600 to be needed to obtain a margin of error of 4 %