Question

A manufacturing company makes drawers for commercial tool cabinets. To assess the quality of the manufacturing process, the company collected one sample of 200 consecutively manufactured drawers each day for 10 days and counted the number of defective items. The resulting sample data are: Sample: Sample Size: 200 200 200 200 200 200 200 200 200 200 Defectives: 8 6 11 15 12 11 9 6 5 4 1 2 3 4 5 6 7 8 9 10 The proportion defective for Sample 1 is A. 0.027 B. 0.040 C. 0.029 D.0.030
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Answer #1

There are total 10 samples and each sample has size 200. Sample 1 has 8 defective items as given in the data.

Proportion of defective = number of defective / sample size

Therefore, proportion defective for sample 1 = 8/200 = 0.040

Hence the answer is B. 0.040

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