Pad 12:42 AM 44% Do Homework - Abdullah aldossary www.mathxl.com MAT 152-06 Elem

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Pad 12:42 AM 44% Do Homework - Abdullah aldossary www.mathxl.com MAT 152-06 Elementary Statistics Abdullah aldossary 12/4/17 4:42 PM Homework: HW 6.2 Save Score: 0 of 1 pt 3 of 12 (7 complete) Hw Score: 41.67%, 5 of 12 pts X) 6.2.7 Question Help Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15 70 105 The area of the shaded region is(Round to four decimal places as needed.) Enter your answer in the answer box and then click Check Answer All parts showing Clear All Check Answer

Explanation / Answer

The mean is 100 and s is 15

z is given as (x-mean)/s

P(70<x<105) is P((70-100)/15<z<(105-100)/15)=P(-2<z<0.33) or P(z<0.33)-(1-P(z<2))

from normal distribution table we get 0.6293-(1-0.9772)=0.6065

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