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SCENARIO 15-5
a Manufacturer of Computer Disks Took Samples of 240

question 15

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SCENARIO 15-5
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 % Bad190.037500270.029167340.016667460.025000580.033333630.012500760.0250008100.0416679160.06666710240.10000011150.0625001290.0375001340.0166671480.0333331560.025000\begin{array}{ccc} \underline{\text { Day }} & \underline{\mathrm{Bad}} & \text { \% } \underline{\mathrm{Bad}}\\1 & 9 & 0.037500 \\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 SCENARIO 15-5, the process seems to be in control.


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