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 2 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 [ ?, ? ]

Confidence Level Critical Value

0.90 z=1.645

0.95 z=1.960

0.99 z=2.576

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