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:
-True or False: Referring to Table 11-8,the randomized block F test is valid only if the population of the amount of time needed has the same variance for the 3 brands.

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: 
-True or False: Referring to Table 11-8,the randomized block F test is valid only if the population of the amount of time needed has the same variance for the 3 brands.

Quizplus · Accepted Answer

The validity of the randomized block F test depends on the assumption of equal variances among the populations represented by the blocks (in this case, the employees) for each treatment (in this case, the database brands). Therefore, the statement is true.

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