Scores on a test have a mean of 81, and Q3 is 82.6. The scores have a distribution that is approximately normal. Find P9

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answerhappygod
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Scores on a test have a mean of 81, and Q3 is 82.6. The scores have a distribution that is approximately normal. Find P9

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Scores on a test have a mean of 81, and Q3 is 82.6. The scores have a distribution that is approximately normal. Find P90 (you will need to find the standard deviation first)
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