A Survey of 25 Grocery Stores Revealed That the Average

Multiple Choice

A survey of 25 grocery stores revealed that the average price of a 4-litre bag of milk was $2.98 with a standard error of $0.10. What is the 95% confidence interval to estimate the true cost of a 4-litre bag of milk?

A) $2.81 to $3.15
B) $2.94 to $3.02
C) $2.78 to $3.18
D) $2.95 to $3.01
E) $2.73 to $3.23