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A simple random sample of 20 items resulted in a sample mean of 10. The population standard deviation is = 3. 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?

## Answer

**0.7906**

What is the standard error of the sample mean?

The standard error of the mean is the standard deviation of the sampling distribution of the sample means.

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