An IQ test has a mean of99and a standard deviation of15.Which is more unusual, an IQ of69or an IQ of142? An IQ test has a mean of 99 and a standard deviation of 15. Which is more unusual, an IQ of 69 or an IQ of 142?Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.O A. An IQ of 142 is more unusual because its corresponding z-score,is further from 0 than the corresponding z-score offor an IQ of 69.(Type integers or decimals rounded to two decimal places as needed.)O B. An IQ of 69 is more unusual because its corresponding z-score,is further from 0 than the corresponding z-score offor an IQ of 142.(Type integers or decimals rounded to two decimal places as needed.)O C. Both IQs are equally likely.

Answered: An IQ test has a mean of 99 and a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

An IQ test has a mean of

and a standard deviation of

15.

Which is more unusual, an IQ of

or an IQ of

142?

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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