A quality assurance inspector carried out a random inspection of 1, 500 products

Question

A quality assurance inspector carried out a random inspection of 1, 500 products produced by two manufacturing companies: 750 were produced by a toy manufacturing company and 750 were produced by a car manufacturing company. The inspection found that 150 of the products were of poor quality, with the remainder being of acceptable quality. Of the 750 products that were produced by the car manufacturing company, 700 were found to be of acceptable quality. In contrast, 100 were found to be of poor quality out of the 750 products that were produced by the toy manufacture company. a) Using this information, construct a two-way contingency table of product quality, by company.

Explanation / Answer

Poor quality Acceptable quality Total Car manufacturing company 50 700 750 Toy manufacturing company 100 650 750 Total 150 1350 1500

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