Mathematics, 06.07.2021 01:00 kameahtravis

In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviation was $775. Construct a 90% confidence interval for this. Assume the annual maintenance costs are normally distributed.

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In a random sample of 35 tractors, the annual cost of maintenance was $4,425 and the standard deviat...

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