If a freshman is selected at random to become student assistant, what is the probability of selecting a student with an IQ between 90 and 120? Draw the normal curve.
The office for admission of XYZ University found out that the IQ of incoming 1200 freshmen normally distributed with a mean of 108 and a standard deviation of 10.
"=P(Z<\\dfrac{120-108}{10})-P(Z\\le\\dfrac{90-108}{10})"
"=P(Z<1.2)-P(Z\\le-1.8)"
"\\approx0.88493-0.03593=0.8490"
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