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

question 54

Short Answer

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

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Definitions:

Share Of Wallet

The proportion of a customer's total spending that is captured by a business, indicating the customer's loyalty and the effectiveness of the company's marketing.

Customer Loyalty

The likelihood of previous customers to continue purchasing from a specific retailer or brand over time.

Purchases

The act of buying goods or services, an exchange of money for ownership or use.

Private-label Brands

Brands that are owned by retailers or suppliers, not the manufacturers, but are produced by third parties.