the following are six observations collected from treatment 1, four observations collected from treatment 2, and five observations collected from treatment 3. test the hypothesis at the 0.05 significance level that the treatment means are equal. treatment 1 treatment 2 treatment 3 9 13 10 7 20 9 11 14 15 9 13 14 12 15 10 required: a. state the null and the alternate hypotheses.