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sample of 32 years is selected from this population. What is the probability that the mean gain for t sample was between 200 and 500?

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sample of 32 years is selected from this population. What is the probability that the mean gain for t sample was between 200 and 500? Assume o = 1215. 7) A sample of 30 diapers yielded a sample average weight of 54.98 g, and the population standard deviation is 0.55g. Construct a 95% confidence interval for the true mean weight of diapers

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