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An agricultural company wanted to know if a new insecticide increases corn yields. Eight test plots...

An agricultural company wanted to know if a new insecticide increases corn yields. Eight test plots showed an average increase of 3.125 bushels per acre when the insecticide was used compared to the previous year. The standard deviation of the increases was 2.911 bushels per acre. The company wants to use a paired t-test to determine the mean increase in yield.

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