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5Can i get all answers in hand written format 5. The grades in the statistic course is known to be normally distributed with a standard

5Can i get all answers in hand written format

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5. The grades in the statistic course is known to be normally distributed with a standard deviation of 22. Suppose that we wish to estimate the mean grade with an error that is less than 4 points at a 95% confidence level. What sample size is required? [3 marks] 1) Critical value 2) Sample Size

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