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A city manager determined that the city’s busiest intersection averages 530 cars per hour during afternoon rush hour. Assume that

A city manager determined that the city’s busiest intersection averages 530 cars per hour during afternoon rush hour. Assume that the standard deviation is 38.4 and a random sample of 60 hours was used to determine the average. Which statements are true about this situation? The margin of error for 95% confidence is about 10 cars. The margin of error for 99% confidence is about 11 cars. The sample isn’t large enough to use a norm

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