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s Exercise 08.01 Algo (Population Mean: Sigma Known) A simple random sample of 40 items resulted in a sample mean of 25. The population standard

s Exercise 08.01 Algo (Population Mean: Sigma Known) A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is o=3. Round your answers to two decimal places. a. What is the standard error of the mean, oi? b. At 95% confidence, what is the margin of error

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