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. $$\begin{array} { | l | c | c | c | c | c | } \hline \underline{\text { Memory Location: }} & 1 & 2 & 3 & 4 & 5 \\\hline \text { Number of Transactions: } & 82 & 100 & 74 & 92 & 102 \\\hline \text { Number of Reported Errors } & 11 & 12 & 6 & 9 & 10 \\\hline\end{array}$$ 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) $\chi ^ { 2 }$ test of independence
b) $\chi ^ { 2 }$ test for difference among more than two proportions
c) Wilcoxon rank sum test
d) Kruskal-Wallis rank Test