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Chebychev Inequality for average time spent in a car

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A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean. Find the probability that the estimate will be in error by less than 5 minutes. Assume that the population standard deviation is 45 minutes.

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Chebychev Inequality for average time spent in a car.

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