We asked UST employees to tell us how many megabytes of memory (RAM) they have on their computer. We would like to test to see if the mean amount of memory is the same for three different academic departments. We have the memory amounts for six faculty members' machines in the three departments shown below.

Dept. 1 Dept. 2 Dept. 3

1 4096 4096 4096

2 4096 2048 4096

3 4096 2048 8192

computer 4 8192 4096 8192

5 4096 2048 4096

6 2048 8192 2048

Here is the ANOVA table:

Analysis of Variance

Source DF Adj SS Adj MS F-Value P-Value

Factor x 5592405 2796203 xxx 0.604

Error xx 80390827 5359388

Total xx 85983232

Calculate the number of degrees of freedom Error.