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Discuss the normality assumption and its role in problem

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Reference no: EM132854759

A printer is advertised to print 6 pages per minute. The rate is calculated based on a printout of a test document, and the statistician repeats the test 20 times. The following pages-per-minute values were obtained from the random sample of 20 printouts: 5.34 6 5.97 5.25 6.65 7.55 7.35 6.35 4.76 5.54 5.44 4.61 5.98 5.62 4.39 6 7.25 6.21 4.98 5.32

a. Construct a 95% con?dence interval estimate of 02, the variance of the number of pages per minute.

b. Test the hypothesis that 02 = 1. Use oz = 0.01.

c. Discuss the normality assumption and its role in this problem.

d. Check the normality assumption and comment on your ?ndings.

Reference no: EM132854759

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