TABLE 11-8
An important factor in selecting database software is the time required for a user to learn how to use the system. To evaluate three potential brands (A, B and C) of database software, a company designed a test involving five different employees. To reduce variability due to differences among employees, each of the five employees is trained on each of the three different brands. The amount of time (in hours) needed to learn each of the three different brands is given below:

Below is the Excel output for the randomized block design:

-Referring to Table 11-8, the decision made at a 0.05 level of significance on the F test for the block effects implies that the blocking has been advantageous in reducing the experiment error.

Question

TABLE 11-8
An important factor in selecting database software is the time required for a user to learn how to use the system. To evaluate three potential brands (A, B and C) of database software, a company designed a test involving five different employees. To reduce variability due to differences among employees, each of the five employees is trained on each of the three different brands. The amount of time (in hours) needed to learn each of the three different brands is given below:
  
Below is the Excel output for the randomized block design:
 
-Referring to Table 11-8, the decision made at a 0.05 level of significance on the F test for the block effects implies that the blocking has been advantageous in reducing the experiment error.

Quizplus · Accepted Answer

The F-test for blocks tests whether the differences between the block means are significant. If the F-test is significant at the chosen level of significance (0.05 in this case), it suggests that the blocking has been effective in reducing the variability due to differences among employees, and thus has been advantageous in reducing the experiment error. Therefore, the statement is true.

TABLE 11-8 An Important Factor in Selecting Database Software Is the Time