For each probability and percentile problem draw the picture 74 Births are approximately uniformly distributed between the 52 weeks of the year They can be said to follow a uniform distribution from one to 53 spread of 52 weeks a X b Graph the probability distribution c f x d e f Find the probability that a person is born at the exact moment week 19 starts That is find P x 19 9 P 2 x 31 h Find the probability that a person is born after week 40 I P 12 xx 28 J Find the 70th percentile k Find the minimum for the upper quarter