In an industrial production line, items are inspected periodically for defectives. The following is a sequence of

Question:

In an industrial production line, items are inspected periodically for defectives. The following is a sequence of defective items, D, and non defective items. N produced by this production line. Use the large-sample theory for the runs test, with a significance level of 0.05, to determine whether the defectives are occurring at,random.