A survey of 25 grocery stores revealed that the mean price of a gallon of milk was $2.98,with a standard error of $0.10. If 90% and 95% confidence intervals were developed to estimate the true cost of a gallon of milk,what similarities would they have?
A)Both have the same confidence level.
B)Both use the same t-statistic.
C)Both use the same z-statistic.
D)Both use the same point estimate of the population mean.

Question

Quizplus · Accepted Answer

Both confidence intervals would use the same point estimate of the population mean, which is $2.98, as the center of their intervals.

A Survey of 25 Grocery Stores Revealed That the Mean