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TABLE 18-5
a Manufacturer of Computer Disks Took Samples of 240

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TABLE 18-5
A manufacturer of computer disks took samples of 240 disks on 15 consecutive days. The number of disks with bad sectors was determined for each of these samples. The results are in the table that follows.
 Day  Bad % Bad 190037500270.029167340.016667460.025000580.033333630.012500760.0250008100.0416679160.06666710240.10000011150.0625001290.0375001340.0166671480.0333331560.025000\begin{array} { l l l } \text { Day } & \text { Bad } & \% \text { Bad } \\\hline 1 & 9 & 0037500 \\2 & 7 & 0.029167 \\3 & 4 & 0.016667 \\4 & 6 & 0.025000 \\5 & 8 & 0.033333 \\6 & 3 & 0.012500 \\7 & 6 & 0.025000 \\8 & 10 & 0.041667 \\9 & 16 & 0.066667 \\10 & 24 & 0.100000 \\11 & 15 & 0.062500 \\12 & 9 & 0.037500 \\13 & 4 & 0.016667 \\14 & 8 & 0.033333 \\15 & 6 & 0.025000\end{array}
-Referring to Table 18-5, construct a p control chart for these data.


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Prescription Drug Plan

A prescription drug plan is a health insurance program designed to cover the costs of prescription medications.

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