SCENARIO 11-1
An airline wants to select a computer software package for its reservation system.Four software packages (1,2,3,and 4)are commercially available.The airline will choose the package that bumps as few passengers as possible during a month.An experiment is set up in which each package is used to make reservations for 5 randomly selected weeks.(A total of 20 weeks was included in the experiment. )The number of passengers bumped each week is obtained,which gives rise to the following Excel output:

-Referring to Scenario 11-1,the among-group (between-group)mean squares is
A)8.525
B)70.8
C)212.4
D)637.2

Question

SCENARIO 11-1
An airline wants to select a computer software package for its reservation system.Four software packages (1,2,3,and 4)are commercially available.The airline will choose the package that bumps as few passengers as possible during a month.An experiment is set up in which each package is used to make reservations for 5 randomly selected weeks.(A total of 20 weeks was included in the experiment. )The number of passengers bumped each week is obtained,which gives rise to the following Excel output:

-Referring to Scenario 11-1,the among-group (between-group)mean squares is
A)8.525 
B)70.8 
C)212.4 
D)637.2

Quizplus · Accepted Answer

The among-group (between-group) mean squares is calculated by dividing the sum of squares for treatment by the degrees of freedom for treatment. In this case, the sum of squares for treatment is 354.2 and the degrees of freedom for treatment is 3 (since there are 4 groups). Therefore, the among-group mean squares is 354.2 / 3 = 118.07.

SCENARIO 11-1 an Airline Wants to Select a Computer Software Package for Package