Question: A simple random sample of 10 items resulted in a sample mean of 15. he population standard deviation is sigma =1 Round your answers to

A simple random sample of 10 items resulted in a sample mean of 15. he population standard deviation is sigma =1 Round your answers to two decimal places.
a. What is the standard error of the mean ?
b. At 95% confidence, what is the margin of error ?

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