Asked by Crystal

The scores on a personality test are normally distributed with a mean of 250 and a standard deviation of 30. What proportion of people taking the test can be expected to score above 229?  

14 years ago

Answered by PsyDAG

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

14 years ago

Answered by Anonymous

-0.7

8 years ago

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