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Name: Lie detector tests involve recording galvanic skin responses (minute a
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Description: Lie detector tests involve recording galvanic skin responses (minute amounts of persperation on the finger tips) as a person answers questions. Almosteveryone’s response increases (more sweat) when stressed or when lying. Examiners ask a series of fa

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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Lie detector tests involve recording galvanic skin responses (minute amounts of persperation on the finger tips) as a person answers questions. Almosteveryone’s response increases (more sweat) when stressed or when lying. Examiners ask a series of factual questions (name, city born in, today’s date, etc.) and compare the skin response with “critical” information questions, such as “Where were you last on Tuesday between 9-11pm?” Suppose a test taker scored a 58.40, and the mean for this test is 46.40 with a SD of 3.00. Past studies have shown that liars tend to score 2 or more standard deviations away from the mean. Determine whether this taker is likely to be lying.

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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