A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon. You know from the water bottling company specifications that the standard deviation of the amount of water is 0.011 gallon. You select a random sample of 45 bottles, and the mean amount of water per 1-gallon bottle is 0.995 gallon.

a. Is there evidence that the mean amount is different from 1.0 gallon? (Use =0.05.)

Let be the population mean. Determine the null hypothesis, H0, and the alternative hypothesis, H1.

H0: = 1.0 correct

H1: 1.0 correct

Part 2

What is the test statistic?

ZSTAT=enter your response here

(Round to two decimal places as needed.)