TABLE 18-5
a Manufacturer of Computer Disks Took Samples

question 78

Short Answer

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.
$$\begin{array} { l l l } \text { Day } & \text { Bad } & \% \text { Bad } \\\hline 1 & 9 & 0037500 \\2 & 7 & 0.029167 \\3 & 4 & 0.016667 \\4 & 6 & 0.025000 \\5 & 8 & 0.033333 \\6 & 3 & 0.012500 \\7 & 6 & 0.025000 \\8 & 10 & 0.041667 \\9 & 16 & 0.066667 \\10 & 24 & 0.100000 \\11 & 15 & 0.062500 \\12 & 9 & 0.037500 \\13 & 4 & 0.016667 \\14 & 8 & 0.033333 \\15 & 6 & 0.025000\end{array}$$
-Referring to Table 18-5, 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:

Similarity To Other Situations

The degree to which a current scenario or issue replicates the aspects or conditions of a different situation previously encountered.

Confirmation Error

A cognitive bias involving the tendency to search for, interpret, favor, and recall information in a way that confirms one’s preexisting beliefs or hypotheses.

Decision Already Made

Decision already made refers to situations where a conclusion or resolution has been reached before discussing or presenting it to others, often making subsequent deliberations or inputs appear redundant.

Circular-Flow Diagram

A visual model that shows how goods, services, and money move through the economy in a circular manner between households and firms.