Question: A sample of 81 dog owners at the Lakefront Dog Park reveals that 20 do not have a

permit to use the park

a. What is the sample proportion of owners without permits? (Show your work)

b. What is the sample standard deviation of owners without permits? (Show your work)

c. What is the standard error of the mean proportion of owners without permits? (Show your work)

d. Find the 95% confidence interval for the mean proportion of owners without permits. (Show your work)