31. In an industrial production line, items are inspected periodically for defectives. The following is a sequence of defective items, D, and nondefective items, N,
31. In an industrial production line, items are inspected periodically for defectives. The following is a sequence of defective items, D, and nondefective items, N, produced by this production line: DDNNNDNNDDNNNN Use the runs test at the 0.05 level of significance to determine whether the defectives are occurring at random or not
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