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The 22,000 students at NCC have mean mileage on their vehicles of µ = 54,000 miles       ...

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Statistics

The 22,000 students at NCC have mean mileage on their vehiclesof µ = 54,000 miles

       with a standard deviationof s = 3,125 miles. Assuming a normal distribution

   a) what is the probability that a randomlyselected student has a car with mileage between 55,000
           and60,000 miles?

b) what percent of student vehicles have mileage above 60,000miles?

c) how many students have cars with mileage below 50,000?

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