question archive IQ scores are measured with a test designed so that the mean is 111 and the standard deviation is 14
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IQ scores are measured with a test designed so that the mean is 111 and the standard deviation is 14. Consider the group of IQ scores that are unusual. What are the z scores that separate the unusual IQ scores from those that are? usual? What are the IQ scores that separate the unusual IQ scores from those that are? usual? (Consider a value to be unusual if its z score is less than −2 or greater than? 2.)