A Market Research Company Was Interested in Assessing How Much

Multiple Choice

A market research company was interested in assessing how much money a single adult typically spent on groceries in one week.Participants were 772 single adults and the mean weekly grocery expenditure was found to be $69.70 with a standard deviation of $2.80.The 99% confidence interval for the mean weekly grocery expenditures for single adults would be _____.

A) [63.19,76.21]
B) [62.49,76.91]
C) [69.65,69.75]
D) [69.47,69.93]
E) [69.44,69.96]