Use the normal distribution of SAT critical reading scores for which the mean is 511 and the standard deviation is 115. Assume the variable x is normally distributed.
(a) What percent of the SAT verbal scores are less than 625?
(b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550?
(a) Approximately what % of the SAT verbal scores ar less than 600?