Sample standard deviation
A random sample of 2008 employed cars for sale on market has an average mileage of 71,420 miles with sample standard deviation of 9,470 miles. The z-score for a used car with 80,500 miles in this sample is ________.
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(a) Determine the probability that either exactly 4 ppl get out on floor 35 or exactly 4 ppl get out on floor 36 (inclusive OR)? (b) Determine the probability that the elevator stops on floors 11, 15, and 39?
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Over the long period of time in large multinational corporation, 15% of all sales trainees are rated as outstanding, 75% are rated as excellent/good, 6% are rated as satisfactory, and 4% are considered unsatisfactory. Calculate the probability th
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