Answered: Σxy- (Σχ ) (Σy)/n V[Σ% - (Σx?/n] [Σyγ -…

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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In Exercises, we repeat data from exercises in Section 14.2. For each exercise, determine the linear correlation coefficient by using
a. Definition on page 645.
b. Formula on page 647.
Compare your answers in parts (a) and (b).
DEFINITION
Linear Correlation Coefficient
For a set of n data points, the linear correlation coefficient, r, is defined by
where sx and sy denote the sample standard deviations of the x-values and y-values, respectively.
FORMULA
Computing Formula for a Linear Correlation Coefficient
The computing formula for a linear correlation coefficient is
x 1 2 3
y 4 3 8

Σxy- (Σχ ) (Σy)/n
V[Σ% - (Σx?/n] [Σyγ - (Σy)?/n]

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