Question: A simple random sample of 40 items resulted in a sample mean of25. 25.The population standard deviation is =8. Round your answer to two decimal

A simple random sample of 40 items resulted in a sample mean of25.

25.The population standard deviation is=8. Round your answer to two decimal places.

a. What is the standard error of the mean,x?

B. at 95% confidence, what is the margin error?

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