For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a marketing survey, a random sample of 728 women shoppers revealed...

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.


In a marketing survey, a random sample of 728 women shoppers revealed that 630 remained loyal to their favorite supermarket during the past year (i.e., did not switch stores).