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Value of percentile-given mean and third quartile

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Reference no: EM1320043

Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90. (You will need to first find the standard deviation.)

a. 88.8

b. 88.3

c. 87.1

d. 87.6

Reference no: EM1320043

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