A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.56 and a standard...

A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.56 and a standard deviation of $0.41.

a. Is there evidence that the population mean retail value of the greeting cards is different from $2.50? (Use a 0.01 level of significance.)

b. Determine the p-value and interpret its meaning