Question

Suppose that we want to compare the waiting times between repairs of two systems (in days), S, and S2. Here are histograms of the waiting times: 4.8 3.6 Frequency 2.4 1.2 0.0 20 30 40 50 60 70 S1 B 6 Frequency NU 0 50 100 150 200 250 300 350 S2 Is it reasonable to assume that A. the populations are normal with equal variances B. the populations are normal with unequal variances C. the populations are not normal D. only one of the populations is normal E. none of the preceding

Answer 1

Answer) C) The populations are not normal

As both the populations appear to be skewed in the right, i.e positively skewed whereas a normal distribution is symmetric in nature.