Null hypothesis | All means are equal | Â | Â | Â | Â |
Alternative hypothesis | Not all means are equal | Â | Â | Â | Â |
Analysis of Variance | Â | Â | Â | Â | Â |
 Source | DF | Adj SS | Adj MS | F-Value | P-Value |
 Processing Phase | 3 | 48.34 | 16.112 | 6.08 | 0.001 |
 Error | 76 | 201.37 | 2.650 |  |  |
 Total | 79 | 249.71 |  |  |  |