TABLE 11-4
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.

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 11-4, the calculated value of the test statistic is ________.
A) -0.1777
B) -0.0185
C) 1.4999
D) 1.5190

Question

TABLE 11-4
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.
  
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 11-4, the calculated value of the test statistic is ________.
A) -0.1777 
B) -0.0185 
C) 1.4999 
D) 1.5190

Quizplus · Accepted Answer

To test the hypothesis of whether the proportion of errors in transactions assigned to each of the 5 memory locations differ, we need to conduct a chi-square test of independence. The calculated value of the test statistic is 1.4999, which we can obtain by using a statistical software or a chi-square calculator. Therefore, the best choice is C. The other options are not correct.

TABLE 11-4 A Computer Used by a 24-Hour Banking Service Is Supposed