SCENARIO 12-4
a Computer Used by a 24-Hour Banking Service

SCENARIO 12-4
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.
$\begin{array} { l|l|l|l|l|l } \hline \quad&\quad&\quad&\quad&\quad&\quad \\ \hline \quad&\quad&\quad&\quad&\quad&\quad \\ \hline \quad&\quad&\quad&\quad&\quad&\quad \\ \hline \quad&\quad&\quad&\quad&\quad&\quad \\\hline\end{array}$
$$\begin{array} { | l | l | l | l | l | l | } \hline \text { MemorvLocation: } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Number of Transactions: } & 82 & 100 & 74 & 92 & 102 \\\hline \text { Number of Reported Errors } & 11 & 12 & 6 & 9 & 10 \\\hline\end{array}$$ The bank manager wanted to test whether the proportion of errors in transactions assigned to each of the 5 memory locations differ.
-Referring to Scenario 12-4, which test would be used to properly analyze the data in this experiment?

A) $x ^ { 2 }$ test of independence
B) $x ^ { 2 }$ test for difference among more than two proportions
C) Wilcoxon rank sum test
D) Kruskal-Wallis rank Test

Correct Answer:

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