Assume that the flight time for a United Airlines flight from Philadelphia to Dallas follows the uniform probability distribution between 210 and 250 minutes. What is the standard deviation of this distribution?

Up to three standard deviations above or below the centerline is the amount of variation that statistical process control allows for:

A) Type I errors. B) about 95.5% variation. C) natural variation. D) all types of variation. E) assignable variation.

An investment promises to pay you the following amounts at the end of each of the next 10 years: (1 ) $1,000, (2 )

$2,000, (3 ) $3,000, (4 ) $4,000, (5 ) - (10 ) $5,000 per year. If you want to earn a return of 8% per year, how much will you be willing to pay for the investment today?