Question: Problem 7.16 (a) Compute a 99% confidence interval for the mean level of cadmium dust and oxide fume for the data set of Problem 1.19.

Problem 7.16

(a) Compute a 99% confidence interval for the mean level of cadmium dust and oxide fume for the data set of Problem 1.19. Assume the data come from a normal distribution.

(b) Compute a 95% upper confidence interval.

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