Question

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 SPSS output:

Source	SS	df	MS	F
Between Groups	212.4	3	-----------	8.304985
Within Groups	136.4	------------	8.525
Total	348.8	------------

1. Name the factor and the number of levels of the factor.                                                    (2)
2. Identify the response variable.                                                                                           (2)
3. Complete the ANOVA table. (Full marks will be awarded for showing the calculations). (4)
4. At the 0.05 level of significance, is there evidence of a difference in the mean number of    customers bumped by the 4 packages? Give all steps of hypothesis testing.                      (6)

Answer 1