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.
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, which test would be used to properly analyze the data in this experiment?

Question

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.

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, which test would be used to properly analyze the data in this experiment?

Quizplus · Accepted Answer

The appropriate test for this scenario would be the Chi-square test for difference among more than two proportions. This test is used to assess if there are significant differences in the proportions of errors across the five memory locations. The test of independence (A) is used to assess if there is an association between two categorical variables. The McNemar test for the difference between two proportions (C) is used to compare the proportions of two related samples, and the McNemar test for the difference among more than two proportions (D) is used to compare the proportions of more than two related samples. None of these tests would be the best choice for this scenario.

TABLE 12-3 A Computer Used by a 24-Hour Banking Service Is Supposed