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Statement of a problem № m92

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A recent study by the Greater Los Angeles Taxi Drivers Association showed that the mean fare charged for service from Hermosa Beach to Los Angeles International Airport is $21 and the standard deviation is $3.50. We select a sample of 15 fares. a. What is the likelihood that the sample mean is between $20 and $23? b. What must you assume to make the above calculation?




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