The manager of a bookstore with a coffee shop wants to know the proportion of customers that come into the store because of the coffee shop. A random sample of 75 customers was polled. Use Sheet 3 of the Excel file linked above to calculate p^ and the 95% confidence interval.

p^=?

Upper bound for 95% confidence interval =

Lower bound for 95% confidence interval =

The manager can say with 95% confidence that the true population proportion of the customers that come into the store because of the coffee shop is in the interval [000000000,000000000].

z=1.960

Excel document- coffee poll 28 people said no and 47 said yes