Contrasts between means

In general, F statistics establish that there is or is not a difference between group means, and means plots suggest where the difference may lie. As this section shows, you can use the One-Way ANOVA procedure to specify exactly how the means differ and test those specifications.

Looking at the DVD data, market researchers ask:

Are the two groups between the ages of 35 and 54 really different from each other?
Can participants under 35 and over 54 be considered statistically equivalent?

This example uses the file dvdplayer.sav. See the topic Sample Files for more information.