Question

uppose that taxis in New York are driven an average of 60,000 miles per year with a standard deviation of 11,000 miles. Assume that the mileage driven for a year is normally distributed. How many miles will the middle 95% of taxis have driven in one year?

Answer 1

usually 95% is considered to be 2 standard deviations from the mean on each side.

so add 11000*3 and subtract 11000*3 from your average to get the high and low bounds.

Answer 2

Okay. Thank you!

Answer 3

your welcome