SOLUTION: Use the normal distribution of SAT critical reading scores for which the mean is 515 and the standard deviation is 111. Assume the variable x is normally distributed. (a) What p

Question 1176494: Use the normal distribution of SAT critical reading scores for which the mean is 515 and the standard deviation is 111. Assume the variable x is normally distributed.
(a) What percent of the SAT verbal scores are less that 600? (Round to two decimal places as needed)
(b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 525?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
<(600-515)/111
<85/111 or 0.766
that probability is 0.7781 rounding the z at the end.
-
z>(10/111) or 0.090
probability is 0.4641, so 464 scores.
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