Scores on a test have a mean of 66 and Q3 is 80. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth. A) 10.5 B) 20.9 C) 9.4

Audrea asked Mar 9, 2022

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Audrea asked Mar 9, 2022

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8 votes

The correct answer is B

Sema answered Mar 13, 2022

by Sema

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