Statistics Solutions

(See) In comparing two quality control procedures in a manufacturing process, the proportions of tested items requiring adjustment or repair are compared.

Question: In comparing two quality control procedures in a manufacturing process, the proportions of tested items requiring adjustment or repair are compared. In 150 items produced under the first procedure, 6% required adjustment or repair, while in 200 items produced under the second procedure, 5% required adjustment or repair. This hypothesis test can be carried out using the following test statistic. In the formula below, give the values of p, c1 and c2 for these data in the test statistic

\[\frac{0.06-0.05}{\sqrt{p\left( 1-p \right)\left( {{c}_{1}}+{{c}_{2}} \right)}}\]

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