Birth weights at a local hospital have a normal distribution with a mean of 110 oz and a standard deviation of 15 oz.
a. What is the probability that a baby born at this hospital will have a weight greater than 125?
b. What is the probability that a baby born at this hospital will have a weight between 110 and 125?
c. What is the probability that a baby born at this hospital will have a weight less than 105?
d. What weights would be cut off values defining the middle 10%?