Please show work!!!! Thanks! IQ scores are measured with a test designed so that

Question

Please show work!!!! Thanks!

IQ scores are measured with a test designed so that the mean is 100 and the standard deviation is 12 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.) What are the z scores that separate the unusual IQ scores from those that are usual? The lower z score boundary is (Simplify your answer.) The higher z score boundary is (Simplify your answer.) What are the IQ scores that separate the unusual IQ scores from those that are usual? The lower bound IQ score is (Simplify your answer.) The higher bound IQ score is Simplify your answer.)

Explanation / Answer

Z Scores , z = (x – ?) / ?

Here ? = 100 and ? = 12

For Unusual, z < -2 and Z>2

lower Z score bounsary will be unusual because z < -2

higher Z score bounsary will be unusual because Z>2

IQ Scores which separates unusual from the usual,

For Unusual, z < -2 and Z>2 and -2<z<2 for Usual

Lower Bound IQ Score Z<-2 and

higher Bound IQ Score Z>2

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