Empirical Rule Stats

Question

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.61 and a standard deviation of 0.44. Using the empirical rule, what percentage of the students have grade point averages that are at least 3.49? Please do not round your answer.

Answer 1

mean = 2.61 sd = .44 using the empirical rule what percent have gpa's at least 3.49??

z = 3.49-2.61)/.44 = .88/.44 = 2

100 - 2.5/2 = 100 - 1.25 = 98.75 percent have at least 3..49