Answered: What does the slope mean for my data?…

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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What does the slope mean for my data?

What does the y - intercept mean for my data?

What does the Correlation Coefficient mean for my data?

Simple linear regression results:

Dependent Variable: Life Expectancy
Independent Variable: Population
Life Expectancy = 75.75267 + 1.2943659e-8 Population
Sample size: 15
R (correlation coefficient) = 0.15016128
R-sq = 0.022548409
Estimate of error standard deviation: 7.3992241

Parameter estimates:

Parameter	Estimate	Std. Err.	Alternative	DF	T-Stat	P-value
Intercept	75.75267	2.2530251	≠ 0	13	33.622648	<0.0001
Slope	1.2943659e-8	2.3636059e-8	≠ 0	13	0.5476234	0.5932

Analysis of variance table for regression model:

Source	DF	SS	MS	F-stat	P-value
Model	1	16.418609	16.418609	0.29989139	0.5932
Error	13	711.73072	54.748517
Total	14	728.14933

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