A normally distributed population has a mean of 500 and a st

A normally distributed population has a mean of 500 and a standard deviation of 50. If one value is randomly selected, what is the probability it is less than 425?

0.4404

0.0668

0.9332

0.5596

Solution

P(x<425)

P( z < (425-500) / 50 )

P( z < -1.5 ) = 0.0668