Question: #22. Medical: Blood Protoplasm

Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood. In healthy adults, x is approximately normally distributed with mean μ = 38 and standard deviation σ = 12 (See reference below). What is the probability that

a.) x is less than 60?

b.) x is greater than 16?

c.) x is between 16 and 60?

d.) x is more than 60? (This may indicate an infection, anemia, or another type of illness.)