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Assume that the weight of a product follows a normal distribution with unknown mean and variance. Now we randomly selected 16 pieces from a batch

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Assume that the weight of a product follows a normal distribution with unknown mean and variance. Now we randomly selected 16 pieces from a batch of products. The sample average weight is 820g, and the sample standard deviation is 60g. Decide whether to reject Ho : u = 800g when the significance level is a = 0.05

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