Question: 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,
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 of1016supermarket shoppers revealed that274always stock up on an item when they find that item at a real bargain price.
(a) Letprepresent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate forp. (Round your answer to four decimal places.)
(b) Find a 95% confidence interval forp. (Round your answers to three decimal places.)lower limitupper limit
Give a brief explanation of the meaning of the interval.
5% of the confidence intervals created using this method would include the true proportion of shoppers who stock up on bargains.
5% of all confidence intervals would include the true proportion of shoppers who stock up on bargains.
95% of the confidence intervals created using this method would include the true proportion of shoppers who stock up on bargains.
95% of all confidence intervals would include the true proportion of shoppers who stock up on bargains.
(c) As a news writer, how would you report the survey results on the percentage of supermarket shoppers who stock up on items when they find the item is a real bargain?
Report the margin of error.
Reportp.
Reportpalong with the margin of error.
Report the confidence interval.
What is the margin of error based on a 95% confidence interval? (Round your answer to three decimal places.)
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