A population of values has a normal distribution with u = 151.4 and o = 89.5 .
a. Find the probability that a single randomly selected value is less than 141.2. Round your answer to
four decimal places.
P(x < 141.2) =
b. Find the probability that a randomly serected sample of size n = 151 has a mean less than 141.2.
Round your answer to four decimal places.
P(M < 141.2) =