male heights are normaly distributed with a mean of 70 and a standard deviation of 2.8 inches. for two randomly selected guys, what's the probability that both of them are 67 inches or shorter? show calculations.
Can someone please help me quickly with this question?
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.
The probability of both/all events occurring is found by multiplying the probabilities of the individual events.