Instruction 18-4
a Manufacturer of Computer Disks Took Samples of 240

question 119

Short Answer

Instruction 18-4
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.
$$\begin{array} { l l l } \text { Day } & \text { Bad } & \text { \% Bad } \\1 & 9 & 0.037500 \\2 & 7 & 0.029167 \\3 & 4 & 0.016667 \\4 & 6 & 0.025000 \\5 & 8 & 0.033333 \\6 & 3 & 0.012500 \\7 & 6 & 0.025000 \\8 & 10 & 0.041667 \\9 & 16 & 0.066667 \\10 & 24 & 0.100000 \\11 & 15 & 0.062500 \\12 & 9 & 0.037500 \\13 & 4 & 0.016667 \\14 & 8 & 0.033333 \\15 & 6 & 0.025000\end{array}$$
-Referring to Instruction 18-4,a p control chart is to be made for these data.The centre line of the control chart is _______.

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Definitions:

Project Organization

A structured setup designed specifically for managing projects, involving roles, responsibilities, and frameworks that direct how a project is executed and controlled.

Standard Deviation

A statistical measure that quantifies the amount of variation or dispersion of a set of data values, indicating how spread out the data points are from the mean.

Cost/Time Trade-Off

A project management concept that emphasizes the relationship between the cost of completing a project and the time it takes to complete it, indicating that decreasing the completion time often results in increased costs.

Critical Path

The chain of crucial operations in a project that must be executed on schedule for the project to be completed by the targeted due date.