Chlorine concentration in a municipal water supply is a uniformly distributed random variable that ranges between 0.74 ppm and 0.98 ppm.
(a) What is the mean chlorine con- centration?
(b) The standard deviation?
(c) What is the probability that the chlorine concen- tration will exceed 0.80 ppm on a given day? (d) Will be under 0.85 ppm?
(e) Will be between 0.80 ppm and 0.90 ppm?