A Quality Control Inspector Keeps a Tally Sheet of the Numbers

question 24

Short Answer

A quality control inspector keeps a tally sheet of the numbers of acceptable and unacceptable products that come off two different production lines. The completed sheet is shown below. $$\begin{array} { | c | c | c | } \hline \text { Production line } & \begin{array} { c } \text { Acceptable } \\\text { products }\end{array} & \begin{array} { c } \text { Unacceptable } \\\text { products }\end{array} \\\hline 1 & 152 & 48 \\\hline 2 & 136 & 54 \\\hline\end{array}$$ Estimate with 95% confidence the difference in population proportions.

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