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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
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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
D) 18.7

User Jared Hoberock
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5 votes
The correct answer is B
User Stefan Medack
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