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7. A journalist believes that, in reality, these batteries have a shorter lifespan than what the company is reporting. He tests a random group of

7. A journalist believes that, in reality, these batteries have a shorter lifespan than what the company is reporting. He tests a random group of 35 of these batteries. a. What is the mean of the sampling distribution of sample means when 35 random batteries are tested? (4 pt) b. What is the standard error of the sampling distribution when 35 random batteries are tested

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