Length of stay in a chronic disease hospital of a certain patient is 60 days with a standard deviation of 15. If it is reasonable to warrant an approximately normal distribution. Of lengths of stay find the probability that a randomly selected patient from this group will have a length of stay
of how many days? That would be the score.
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.