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A random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.

A random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.97.
a. Find a 95% confidence interval for the mean prince of all summer sleeping bags.
b. What is the margin error?

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