What is the margin of error based on a confidence interval

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How do you answer the following question in excel, using excel formulas? with explanation please.

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 1010 supermarket shoppers revealed that 260 always stock up on an item when they find that item at a real bargain price.

a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.)

b) Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.)

Upper Limit

Lower Limit

What is the margin of error based on a 95% confidence interval? (Enter a number. Round your answer to three decimal places.)

Margin of Error

Reference no: EM132404090

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