Machine Breakdowns The number ofmachine breakdowns per
Chapter 15, Problem 27(choose chapter or problem)
Machine Breakdowns The number ofmachine breakdowns per month was recordedfor 9 months on two identical machines, A and B, usedto make wire rope:Month A B1 372 14 123 794 10 155 9126 667 13 128 659 713 a. Do the data provide sufficient evidence to indicatea difference in the monthly breakdown rates for thetwo machines? Test by using a value of a near .05.b. Can you think of a reason the breakdown ratesfor the two machines might vary from month tomonth?
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