If the mean wage of a part time lecturer in a college is 250.00 per month and standard deviation of 25.00.find these probabilities for a randomly selected lecturer,assuming the variable is normally distributed,
a.the lecturer earns more than 280.00.
b.the lecturer earns more than 200.00.
a) 280 -250 divided by z = 1.2
Use a z- table to find the probability greater than z = 1.2