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Intelligence Quotient (IQ) Scores Are Assumed to Be Normally Distributed 02p(x)dx\int _ { 0 } ^ { 2 } p ( x ) d x

Question 33

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Intelligence Quotient (IQ) scores are assumed to be normally distributed in the population. The probability that a person selected at random from the general population will have an IQ between 100 and 120 is given by 02p(x)dx\int _ { 0 } ^ { 2 } p ( x ) d x Use the graph of p (x) graphed below to answer the questions which follow:  Intelligence Quotient (IQ) scores are assumed to be normally distributed in the population. The probability that a person selected at random from the general population will have an IQ between 100 and 120 is given by  \int _ { 0 } ^ { 2 } p ( x ) d x  Use the graph of p (x) graphed below to answer the questions which follow:    (a) Use Simpson's Rule with n = 4 to approximate  \int _ { 0 } ^ { 2 } p ( x ) d x   (b) The probability that a person selected from the general population will have an IQ score between 80 and 120 is given by  \int _ { - 2 } ^ { 2 } p ( x ) d x  What is the approximate value of  \int _ { - 2 } ^ { 2 } p ( x ) d x ?  (c) Since p (x) represents a probability distribution, the entire area of the region under the graph is exactly 1. Using this information, what is the approximate probability that a person selected at random from the general population will have an IQ score over 120?
(a) Use Simpson's Rule with n = 4 to approximate 02p(x)dx\int _ { 0 } ^ { 2 } p ( x ) d x
(b) The probability that a person selected from the general population will have an IQ score between 80 and 120 is given by 22p(x)dx\int _ { - 2 } ^ { 2 } p ( x ) d x What is the approximate value of 22p(x)dx?\int _ { - 2 } ^ { 2 } p ( x ) d x ? (c) Since p (x) represents a probability distribution, the entire area of the region under the graph is exactly 1. Using this information, what is the approximate probability that a person selected at random from the general population will have an IQ score over 120?

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