Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11 7 Fi...

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Question

Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11 7 Find P81 , which separates the

Answer 1

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Answer #1

P81 = Mean + z * Standard deviation , Where Z is critical value at 81% confidence level.

= 63.2 + 0.8779 * 11.7 (Z critical value calculated from Z table)

= 73.47

Answer 2

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