Suppose that in Problem 9.16, the standard deviation is 0.012 gallon.
a. Repeat (a) through (d) of Problem 9.16, assuming a standard deviation of 0.012 gallon.
b. Compare the results of (a) to those of Problem 9.16.
In problem
a. Is there evidence that the mean amount is different from 1.0 gallon? (Use α = 0.01.)
b. Compute the p-value and interpret its meaning.
c. Construct a 99% confidence interval estimate of the population mean amount of paint.
d. Compare the results of (a) and (c). What conclusions do you reach?