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, which test would be used to properly analyze the data in this experiment?
A) χ² test of independence
B) χ² test for difference among more than two proportions
C) χ² test for difference between two proportions
D) none of the above

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, which test would be used to properly analyze the data in this experiment?
A) χ² test of independence 
B) χ² test for difference among more than two proportions 
C) χ² test for difference between two proportions 
D) none of the above

Quizplus · Accepted Answer

Since we are comparing the proportion of errors in transactions assigned to each of the five memory locations, a χ² test for difference among more than two proportions would be the appropriate test to use.

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