Random Samples
Random Samples of 200 Parts Were Taken on an Assembly

question 130

Essay

Random samples
Random samples of 200 parts were taken on an assembly line every hour for the past 25 hours. The number of defective parts is shown in the accompanying table.
$$\begin{array}{l}\begin{array} { | l | l l l l l l l l l l l l l | } \hline \text { Sample } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 \\\hline \begin{array} { l } \text { Number of } \\\text { defectives }\end{array} & 5 & 2 & 4 & 10 & 2 & 6 & 8 & 2 & 0 & 5 & 12 & 11 & 8 \\\hline\end{array}\\\\\begin{array} { | l | c c c c c c c c c c c c | } \hline \text { Sample } & 14 & 15 & 16 & 17 & 18 & 19 & 20 & 21 & 22 & 23 & 24 & 25 \\\hline \begin{array} { l } \text { Number of } \\\text { defectives }\end{array} & 10 & 5 & 13 & 7 & 5 & 7 & 11 & 3 & 16 & 3 & 2 & 10 \\\hline\end{array}\end{array}$$
-Construct the p chart and determine if the production process is under control.

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Definitions:

Manufacturing Firms

Companies engaged in the industrial process of converting raw materials into finished products through human labor and machinery.

Disposable Income

The disposable income households have for expenditures and savings, post-income taxation.

C + I

A formula component in macroeconomics representing total private consumption (C) plus total private investment (I).

MPS

The marginal propensity to save, which is the fraction of an additional unit of income that is saved rather than spent.