For a recent English exam,use the Normal model N(73,9.2) to find the percent of scores between 56 and 87.Round to the nearest tenth of a percent.

A) 90.4%
B) 3.2%
C) 3.37%
D) 9.7%
E) 96.6%

Question

For a recent English exam,use the Normal model N(73,9.2) to find the percent of scores between 56 and 87.Round to the nearest tenth of a percent.A) 90.4%B) 3.2%C) 3.37%D) 9.7%E) 96.6%

Julie White · Accepted Answer

Final Answer : A, Explanation :  The z-score for 56 is (56-73)/9.2 = -1.87 and the z-score for 87 is (87-73)/9.2 = 1.52. The area between these two z-scores is 0.904, or 90.4%.

For a recent English exam,use the Normal model N(73,9.2) to find the percent of scores between 56 and 87.Round to the nearest tenth of a percent.

A) 90.4%
B) 3.2%
C) 3.37%
D) 9.7%
E) 96.6%

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