test the hypothesis at the .05 significance level that the treatment means are equal.

treatment 1: 9,7, 11, 9, 12, 11
treatment 2: 13, 20, 14, 13
treatment 3: 10, 9, 15, 14, 15

a. state null & alternate hypothesis
b. decision rule
c. SST, SSE, and SS total
d. ANOVA table
e. state your decision