Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. Assume the random variable x is normally distributed with mean mu=83 and standard deviation sigma=4. Determine the probability that a value x selected at random is less than 80. P(x < 80)= Assume a member is selected at random from the population represented by the graph below. Find the probability that the member selected at random is from the shaded area of the graph. Assume the variable x is normally distributed. P(200 < x < 233)