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

question 63

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 estimate of the standard error of the proportion of disks with bad sectors is _______.

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Definitions:

Statement of Comprehensive Income

The statement of comprehensive income is a financial statement that presents a company's total income, including both net income and other comprehensive income items not recognized in profit and loss statements.

Snapshot

A detailed view or representation of something at a particular moment in time.

Period of Time

A specific duration during which an event occurs or a condition remains in effect.

Cash Flows

The aggregated volume of money transactions both incoming and outgoing in a firm, markedly influencing its ability to provide liquidity.