Question: For a data set obtained from a sample, n = 81 and . It is known that = 4.8. a. What is the point

For a data set obtained from a sample, n = 81 and . It is known that σ = 4.8.
a. What is the point estimate of µ?
b. Make a 95% confidence interval for µ.
c. What is the margin of error of estimate for part b?

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