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Unformatted text preview: c. What IQ score will place an individuals IQ in the top 1%? With a proportion of 1% on the right, we have 99% on the left. The Z table can only be read from LEFT TO RIGHT. So we have to find the Z value that yields a proportion of 99%=0.99. Using the Z table, this Z=2.33. Now going by the formula X=Z+ X=2.33*20+100=146.6. One has to score at least 146.6 in the IQ test to be placed in the top 1% of all IQ test takers! QUIZ #4 MATH 1070 Spring 2008 March 19 th , 2008 3. Given the following diagram and that X is a random variable a. Find the probability P ) 2 4 . ( X A= h b * * 2 1 = 8 . * ) 4 . 2 ( * 2 1-= 64 . 8 . * 8 . 8 . * ) 6 . 1 ( * 2 1 = = b. Classify X as a either continuous or discrete random variable. Explain your reasoning This is a continuous random variable because X can attain infinite values over the interval ) 2 4 . ( X...
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- Spring '08
- Standard Deviation