To compare the crop yields from two strains of wheat, A and B, an experiment was conducted at eight farms located in different parts of a state. At each farm, strain A was grown on one plot and strain B on another; all 16 plots were of equal sizes. Given below are data of yield in pounds per plot.

(a) Is there strong evidence that strain A has a higher mean yield than strain B? Test at α = .05.
(b) What should be randomized in this experiment and how?

Transcribed Image Text:

Farm Strain A 23 39 19 43 33 29 28 42 Strain B 18 33 21 34 33 20 21 40