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A farmer is considering a new variety of wheat

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A farmer is considering a new variety of wheat. He'll plant it if it has higher yield. He conducts an experiment with the null hypothesis that the new variety has the same yield as his old variety, and the alternative hypothesis that the new variety has higher yield. He'll plant the new variety if the null is rejected; otherwise, he'll keep planting the old.

a. A Type I error has what consequences?

b. A Type II error has what consequences?