Homework: HW 3.4 Score: 0 of 1 pt 3.4.9 Save 4 of 1 7 (3 complete) HW Score: 17.
ID: 2264927 • Letter: H
Question
Homework: HW 3.4 Score: 0 of 1 pt 3.4.9 Save 4 of 1 7 (3 complete) HW Score: 17.65%, 3 of 17 pts Question Help IQ scores are measured with a test designed so that the mean is 95 and the standard deviation is 16. 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.)Explanation / Answer
Z score boundary = mean +- z*standard deviation
= 95 +- 2(16)
= 63 to 127
Lower Z score is when Z < -2
Thus, lower Z score boundary is 63
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