Question: A simple random sample of 50 items resulted in a sample mean of 25.1. The population standard deviation is 4. At 95% confidence, what is

A simple random sample of 50 items resulted in a sample

A simple random sample of 50 items resulted in a sample mean of 25.1. The population standard deviation is 4. At 95% confidence, what is the margin of error? Hint: The sample size n=50>30, meaning that you can use the normal Z distribution and there's no need to use the t-distribution

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