Ace used-car sales manager jack has no idea whether the, Ask an Expert

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Ace used-car sales manager Jack has no idea whether the $100,000 he pays for training for his used car salespeople works. He asks Dave, the leading salesperson, and Dave says he thinks it works but can't really tell. So, Jack has hired your local helpful stats star and asked whether the training makes a difference. Here are the data-you tell Jack whether the training worked.

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