Question: A population has a standard deviation of 50. A random sample of 100 items from this population is selected. The sample mean is determined to

A population has a standard deviation of 50. A random sample of 100 items from this population is selected. The sample mean is determined to be 600. At 95% confidence, the margin of error is
a. 5
b. 9.8
c. 650
d. 609.8

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