SOLUTION: A guidance councilor wants to find the percentile rank for a child scoring 109 on the wechshler IQ test. Assuming the scores in this standardized test is approximately normally dis

Question 1161886: A guidance councilor wants to find the percentile rank for a child scoring 109 on the wechshler IQ test. Assuming the scores in this standardized test is approximately normally distributed with a population mean of 100 and a standard deviation of 15. What is the percentile rank for the child scoring 109?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(109-100)/15=0.6
probability of z being at 0.6 or less is 72.57% or 73 rd percentile
or 2nd VARS(-1000,109,100,15) ENTER. Want the left number to essentially be minus infinity.
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