Consider the double sampling plan for Spire CDs described in this section. Over aperiod of one year, 3,860 boxes of records are subject to inspection using this plan.If 60 percent of these batches are “good” (that is, in 60 percent of the batches theproportion of defectives is exactly 10 percent) and 40 percent are “bad” (that is, in40 percent of the batches the proportion of defectives is exactly 30 percent), thenwhat is the expected number of batchesb. Rejected?

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Chapter2: Introduction To Spreadsheet Modeling
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Consider the double sampling plan for Spire CDs described in this section. Over a
period of one year, 3,860 boxes of records are subject to inspection using this plan.
If 60 percent of these batches are “good” (that is, in 60 percent of the batches the
proportion of defectives is exactly 10 percent) and 40 percent are “bad” (that is, in
40 percent of the batches the proportion of defectives is exactly 30 percent), then
what is the expected number of batches
b. Rejected?

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