Xavier Fleet operates and manages car rentals for Xavier emp…
Xavier Fleet operates and manages car rentals for Xavier employees. They found that the tire lifetime for their vehicles has a mean of 50,000 miles and a standard deviation of 3500 miles. What is the probability that the sample mean lifetime for these vehicles is more than 45,000? [prob] What is the mileage of the below 10% of vehicles? [mileage]
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The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are _____.
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