A process produced good parts and defective parts. A sample of 60 parts was taken and inspected. Eight defective parts were found. The sequence of good and defective parts was analyzed by using Minitab. The output is given here.With a two-tailed test and α = .05, what conclusions can be reached about the randomness of the sample?
Runs Test: Defects
Runs test for Defects
Runs above and below K = 0.1333
The observed number of runs = 11
The expected number of runs = 14.8667
8 Observations above K, 52 below
P-value = 0.0264