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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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