SOLUTION: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using the Empirical Rule, approximately, what percent of the students scored above 22

Question 1162450: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using the Empirical Rule, approximately, what percent of the students scored above 224?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
224 is 2 sd s above 200 (224-200)/12
We know that 5% of the distribution is more than 2 sd s from the mean using the empirical rule. Half of that is involved here, and that probability is therefore 2.5%.
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