A manufacturing company makes runners for cabinet drawers. To assess the quality

Question

A manufacturing company makes runners for cabinet drawers. To assess the quality of the manufacturing process, the company collected one sample of 300 consecutively manufactured runners each day for 20 days and counted the number of defective items. The resulting sample data are:

Sample:             1      2      3      4      5      6      7      8      9    10
Sample Size:   300 300 300 300 300 300 300 300 300 300
Defectives:        8       6     11    15    12    11     9      6      5      4

The proportion defective for Sample 1 is?

Explanation / Answer

From the given data ,defective for sample 1 is 8 and sample size is 300

Hence the proportion defective for sample 1 is,

P1=8/300=0.0267

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