A machine is used to fill containers with a liquid product Fill volume can be assumed to be normally distributed A random sample of twelve containers is selected, and the net contents (oz) are as follows 13 03 13 01 13 04 13 03 13 05 12 98 12 96 13 03 13 05 13 03 13 13 03 12 98 12 99 (a) Suppose that the manufacturer wants to be sure that the mean net contents exceeds 13 oz Test the hypothesis (use 0 05) (b) Construct a 90 two sided confidence interval

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Question: A machine is used to fill containers with a liquid product. Fill volume can be assumed to be normally distributed. A random sample of twelve

A machine is used to fill containers with a liquid product. Fill volume can be assumed to be normally distributed. A random sample of twelve containers is selected, and the net contents (oz) are as follows:

13.03
13.01
13.04
13.03
13.05
12.98
12.96
13.03
13.05
13.03
13
13.03
12.98
12.99

(a) Suppose that the manufacturer wants to be sure that the mean net contents exceeds 13 oz. Test the hypothesis. (use = 0.05).

(b) Construct a 90% two-sided confidence interval.

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