SCENARIO 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 Scenario 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

SCENARIO 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 Scenario 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 randomized block F test assumes equal variances among the treatment groups (in this case, the 3 brands of database software). Therefore, the test is only valid if this assumption is met.

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