The weekly salaries of teachers in one state are normally distributed with a meanof $490 and a standard deviationof $45.
a. What is the probabilitythat a randomly selected teacher earns more than $525 per week?
b. What is the probability a randomly selected teacher earns less than $435 per week?
M = 490, SD = 45
z = (X – M)/SD
(a) z = (525 – 490)/45 = 0.77
Probability that a randomly …
The solution determines what the probability of a randomly selected teacher that earns more or less than a specific amount a week.