Passengers using New York's MetroCard system must swipe the card at a rate between 10 and 40 inches per second, or else the card must be re-swiped through the card reader. Research shows that actual swipe rate by subway riders are uniformly distributed between 5 and 50 inches per second.
A. What is the mean swipe rate?
B. What is the standard deviation of the swipe rate?
C. What are the quartiles?
D. What % of subway riders must re-swipe the cards because they were outside the acceptable range?
1 answer