The scientists referred to in Exercise 1 also considered the effect of gypsum on the electrical conductivity of soil. Two types of soil were treated with three different amounts of gypsum. The results are as follows.

a. Can you reject the hypothesis of no interactions? Explain.
b. Can the main effect of the amount of gypsum be interpreted? If so, interpret the main effect. Use the a = 0.05 level of significance. 

c. Can the main effect of soil type be interpreted? If so. interpret the main effect. Use the a = 0.05 level of significance. 

Transcribed Image Text:

Soil Type A 1.52 1.05 Soil Type B 1.01 0.92 No Gypsum Low Gypsu 149 09 1.12 0.92 High Gvpsuim 0.99 0.920.88 092