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A recent study by the Greater Los Angeles Yak Drivers Association showed that the mean fare charged for service from Hermosa Beach to the Los

A recent study by the Greater Los Angeles Yak Drivers Association showed that the mean fare charged for service from Hermosa Beach to the Los Angeles International Airport is $18.00 and the standard deviation is $3.50. If we select a sample of 15 fares, what's the likelihood that the sample mean is between $16.00 and $20.00, assuming a normal distribution?

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