Question

Consider a test of coordination that has a normal distribution, a mean of 70, and a standard deviation of 15. (a) How high a score would a person need to have to be in the top 1%? (b) Explain your answer to someone who has never had a course in statistics

Answer #1

By using the normal curve table 2.33 (0.0099 = 1) So for the sake of this problem I will use2.33 as the Z score that correlates with having to be in the top 1%

Z = 2.33

Mean (M) = 70; SD = 15

X = Z(SD) + M

X = 2.33(15) + 70

X = 105

105 would a person need to have to be in the top 1%

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