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A farmer uses a lot of fertilizer to grow his crops. The farmer's manager thinks fertilizer products from distributor A contain more of the nitrogen

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A farmer uses a lot of fertilizer to grow his crops. The farmer's manager thinks fertilizer products from distributor A contain more of the nitrogen that his plants need than distributor B's fertilizer does. He takes two independent samples of four batches of fertilizer from each distributor and measures the amount of nitrogen in each batch. Fertilizer from distributor A contained 24 pounds per batch and fertilizer from distributor B contained 14 pounds per batch. Suppose the population standard deviation for distributor A and distributor B is six pounds per batch and seven pounds per batch, respectively. Assume the distribution of nitrogen in fertilizer is normally distributed. Let /1 and //2 represent the average amount of nitrogen per batch for fertilizer's A and B, respectively. Which of the following is the correct value of the test statistic? Multiple Choice 2 = 2.1693 O t6 = 2.1693 O t6 - -2. 1693 2=-2,1693

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