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Sixteen cars are randomly selected and weighed from a population that is approximately normal with variance of 400 lbs. The mean weight was 3850 lbs.

Sixteen cars are randomly selected and weighed from a population that is approximately normal with variance of 400 lbs. The mean weight was 3850 lbs.

a) What is the point estimate for the mean of population?

b) Estimate the mean weight of all cars with 98% confidence.

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