(Answered) A company that makes shampoo wants to test the average

Statistics

A company that makes shampoo wants to test the average amount of shampoo per bottle is 16 oz. The standard deviation is known to be 0.20 oz. Assuming that the hypotheses test is to be performed using 0.10 level of significance and a random sample of n=64 bottles, how large could the sample mean be before they would reject the null hypothesis?

How do you find the sample mean?

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