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Assume that student are to be sperated into a group with IQ scores in the bottom...

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Statistics

Assume that student are to be sperated into a group with IQscores in the bottom 30%, a second group with scores in the middle40%, and a third group with scores in the top 30%. The WechslerAdult Intelligence Scale yields an IQ score obtained through atest, and the scores are normally distributed with a mean of 100and a standard deviation of 15. Find the IQ score that seperatesthe three groups.

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3.6 Ratings (288 Votes)
Solution mean 100standard deviation 15Using standard normal tablea First GroupPZ z 30PZ z 030PZ    See Answer
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