Your statistics instructor wants you to determine a confidence interval estimate for the mean test score. Past experience indicated that tests scores are normally distributed with a sample mean of 160 and a population standard deviation of 45. The critical value to estimate a 95% confidence interval of the population means is OA. 1.645 OB. 1.96 OC. 2.021 OD. 1.684 QUESTION 4

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Q: Your statistics instructor wants you to determine a confidence interval estimate for the mean test…

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