11.2 ANOVA with a Single Factor
This problem deals with the comparison of the means of three treatments, being ‘Variety of tree’ the only factor under study.
If we place the data for each type of tree in a different column, we have to proceed as shown below.
Stat > ANOVA > One-Way (Unstacked)
In the worksheet, both the residuals and the fitted values are stored (we checked these options in the initial dialog box).
If the data of the three varieties of trees are stored in one single column, we have to choose the following.
Stat > ANOVA > One-Way
All options and results ...