Answered: TOPIC : MEASURES OF DISPERSION Please…

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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TOPIC : MEASURES OF DISPERSION

Please use your group data to formulate these following items.

1. Range, its meaning, and the formula.

2. Mean Deviation, its meaning, and the formula.

3. Standard Deviation, its meaning, and the formula.

4. Variance, its meaning and the formula.

Picture below is the group data:

100
125
110
100
90
91
100
120
120
100
150
130
135
100
85
95
96
115
111
160
165
170
175
175
180
190
95
90
85
100
165
170
180
190
300

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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