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:

Sound Vibration

The movement of air particles caused by a vibrating object, which travels to the ear and is interpreted as sound.

Frequency

The rate at which a repeating event occurs, such as the number of occurrences of a signal or event per unit of time.

Conversational Tones

Conversational tones are relaxed and informal styles of communication that mimic everyday spoken language, often used to make written content more engaging and accessible.

Rising Inflection

An increase in pitch or tone of the voice towards the end of a sentence, often indicating a question or increasing emphasis.