We have an experiment in which crop yields per unit area were measured from 10 randomly selected fields on each of three soil types. All fields were sown with the same variety of seed and provided with the same fertilizer and pest control inputs. The question is whether soil type
significantly affects crop yield, and if so, to what extent.


sand	clay	loam
6	17	13
10	15	16
8	3	9
6	11	12
14	14	15
17	12	16
9	12	17
11	8	13
7	10	18
11	13	14