TABLE 12-3
a Computer Used by a 24-Hour Banking Service

question 33

Multiple Choice

TABLE 12-3
A computer used by a 24-hour banking service is supposed to randomly assign each transaction to one of 5 memory locations. A check at the end of a day's transactions gave the counts shown in the table to each of the 5 memory locations, along with the number of reported errors.
$$\begin{array}{l}\begin{array} { l l l l l r } \hline \text { Memory Location: } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Number of Transactions: } & 82 & 100 & 74 & 92&102\\\text { Number of Reported Errors: } & 11 & 12 & 6 & 9 & 10\end{array}\end{array}$$
The bank manager wanted to test whether the proportion of errors in transactions assigned to each of the 5 memory locations differ.
-Referring to Table 12-3, at 1% level of significance

• A) there is sufficient evidence to conclude that the proportion of errors in transactions assigned to each of the 5 memory locations are not all the same.
• B) there is insufficient evidence to conclude that the proportion of errors in transactions assigned to each of the 5 memory locations are not all the same.
• C) there is insufficient evidence to conclude that the proportions of errors in transactions assigned to each of the 5 memory locations are all different.
• D) there is sufficient evidence to conclude that the proportions of errors in transactions assigned to each of the 5 memory locations are all different.

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Definitions:

Eidetic Imagery

The rare ability to recall images, sounds, or objects in memory with high precision for a brief period after only a few instances of exposure.

Analogy

A comparison between two things, typically for the purpose of explanation or clarification.

Photograph

A picture made using a camera, where light is captured and recorded on a light-sensitive surface.

Sensory Memory

The shortest-term element of memory, it is the ability to retain impressions of sensory information after the original stimuli have ended, acting as a buffer for stimuli received through the senses.