Getting the ANOVA Table
- Enter the values into one column and then list the levels of the factorA in the second column, the levels of factor B in the third column and the levels of factor C in the third column . Your worksheet should look like this.
6 8 W A
9 8 W A
1 8 W A
3 8 W A
7 8 W B
- Go to Stat, Basic Statistics, ANOVA, Balanced ANOVA. The following screen should appear.
- Enter the values into the Response box.
- Under the Model box, you need to enter the names of the three factors that you are using.
- You also need to add all of the interaction terms. If you are do a three factor problem, you should have four itneractions. For this problem, there is time*heat, heat*machine, time*machine, and the three way interaction, time*machine*heat.
- Hit O.K. You should get the following output.
ANOVA: length versus Time, Heat, Machine
Factor Type Levels Values
Time fixed
3 3 8
11
Heat fixed
2 L
W
Machine fixed 4
A B C
D
Analysis of Variance for length
Source
DF SS
MS F
P
Time
2 12.896
6.448 1.04 0.360
Heat
1 100.042 100.042
16.10 0.000
Machine
3 393.417 131.139
21.10 0.000
Time*Heat
2 1.646
0.823 0.13 0.876
Time*Machine
6 71.021
11.837 1.90
0.092
Heat*Machine
3 1.542
0.514 0.08
0.969
Time*Heat*Machine 6
9.771 1.628
0.26 0.953
Error
72 447.500
6.215
Total
95 1037.833