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For a data set obtained from a sample, n=75 and x¯=47.80. It is known that σ=3.8. a....

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Statistics

For a data set obtained from a sample, n=75 and x¯=47.80. It isknown that σ=3.8.

a. What is the point estimate of μ?

The point estimate is .

b. Make a 90% confidence interval for μ.

Round your answers to two decimal places.

(,)

c. What is the margin of error of estimate forpart b?

Round your answer to three decimal places.

E=

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