A new fertilizer has been developed to increase the yield on crops, and the makers of the fertilizer want to better understand which of the three formulations (blends) of this fertilizer are most effective for wheat, corn, soybeans and rice (crops). They test each of the three blends on one sample of each of the four types of crops. The crop yields for the 12 combinations are as shown. Determine if there is a significant difference at 0.01 level of significance. Crops (Factor B) Factor A Wheat Corn Soy Soy (Blend) Blend A 123 138 151 110 140 Blend B 145 165 167 Blend C 156 176 185 175

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A: a)

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