The yield of alfalfa from a random sample of six test plots is 1.4, 1.6, 0.9, 1.9, 2.2, and 1.2 tons per acre. Assume the data can be looked upon as a sample from a normal population. Test at the 0.05...

The yield of alfalfa from a random sample of six test plots is 1.4, 1.6, 0.9, 1.9, 2.2,
and 1.2 tons per acre. Assume the data can be looked upon as a sample from a
normal population. Test at the 0.05 level of significance whether this supports the
contention that the average yield for this kind of alfalfa is 1.5 tones per acre.