An IQ score has a mean, u = 90, and standard deviation, σ = 10. 1. A genius is sometimes characterized as a person with an IQ score of 140 or above. What fraction of the population scores at the genius level? 2. What would the IQ score correspond to the 99th percentile?

An IQ score has a mean, u = 90, and standard deviation, σ = 10. 1. A genius is sometimes characterized as a person with an IQ score of 140 or above. What fraction of the population scores at the genius level? 2. What would the IQ score correspond to the 99th percentile?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

An IQ score has a mean, u = 90, and standard deviation, σ = 10.

1. A genius is sometimes characterized as a person with an IQ score of 140 or above. What fraction of the population scores at the genius level?

2. What would the IQ score correspond to the 99th percentile?

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