Posted by **Josh** on Wednesday, July 18, 2012 at 3:57pm.

Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows;

3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98

a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate conclusions. Use the P-value approach.

b. Find a 99% two-sided CI on the mean percentage of enrichment. Are you confortable with the statement that the mean percentage of enrichment is 2.95%? Why?

c. What would you use to check the normality assumption of the data?

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