The national average for the math portion of the College Boards SAT test is 515 (the World

Question:

The national average for the math portion of the College Board’s SAT test is 515 (the World Almanac, 2009). The College Board periodically rescales the test scores such that the standard deviation is approximately 100. Answer the following questions using a bell-shaped and the empirical rule for the math test scores.
a. What percentage of students have an SAT math score greater than 615?
b. What percentage of students have an SAT math score greater than 715?
c. What percentage of students have an SAT math score between 415 and 515?
d. What percentage of students have an SAT math score between 315 and 615? Distribution
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