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

question 85

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.
$$\begin{array}{l}\begin{array} { l l l l l r } \hline \text { Memory Location: } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Number of Transactions: } & 82 & 100 & 74 & 92&102\end{array}\\\begin{array} { l l l l l l } \text { Number of Reported Errors: } & 11 & 12 & 6 & 9 & 10\end{array}\end{array}$$ 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, the calculated value of the test statistic is

• A) -0.0185.
• B) 1.4999.
• C) 1.5190.
• D) -0.1777.

---

Definitions:

Extreme Scores

Values in a data set that are significantly higher or lower than the majority of the other scores, potentially skewing results.

Less Extreme

Refers to measures or values that are closer to the average or mean in a distribution, as opposed to being more extreme or far from the average.

Mean

A statistical measure representing the average value in a set of numbers, calculated by dividing the sum of all values by the number of values.

Statistical Regression

A statistical process for estimating the relationships among variables, often used to predict the value of a dependent variable based on one or more independent variables.