Reference no: EM132464403
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 1014 supermarket shoppers revealed that 274 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.)
Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.)
lower limit
upper limit
Give a brief explanation of the meaning of the interval.
A) 5% of all confidence intervals would include the true proportion of shoppers who stock up on bargains.
B) 95% of the confidence intervals created using this method would include the true proportion of shoppers who stock up on bargains.
C) 5% of the confidence intervals created using this method would include the true proportion of shoppers who stock up on bargains.
D) 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 p^.
Report the confidence interval.
Report the margin of error.
Report p^ along with the margin of error.
What is the margin of error based on a 95% confidence interval? (Enter a number. Round your answer to three decimal places.)