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Question 6 An unknown distribution has a mean of 90 and a standard deviation of 20. Samples of sizen-50 are drawn randomly from the population.

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Question 6 An unknown distribution has a mean of 90 and a standard deviation of 20. Samples of sizen-50 are drawn randomly from the population. Find the probability that the sample mean is between 85 and 95. (round to 4 decimal places) Example page 397 Wk6Hw_Smp Mean2

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