13.A rivet is to be inserted into a hole. A random sample of parts is selected, and the hole diamete

/in /by

13.A rivet is to be inserted into a hole. A random sample of parts is selected, and the hole diameter is measured. The sample standard deviation of the hole diameter measurements is 0.008 millimeters.

(i)Find a 99% confidence interval for .

(ii)Find a 95% upper confidence bound for the mean if .

 

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