MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Concept explainers

Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
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Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as p…
Question
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Look at the Table, specifically the information related to "stroke severity." What is the dependent and the independent variables? Provide an interpretation of the coefficient (coeff), standard error (SE), and p-value for temperature & previous stroke.

Varlable Covariate Coeff (b) SE (b) Stroke severity Temperature Male 0-0085 0-0050 -3.70 1-40 4-68 1-66 Previous stroke -4-56 1-91 0-0175 Atrial fibrillation -5-07 2-05 0-0138 -1-21 <0-0001 Leucocytosis Infections 0-28 -10-74 2-43 <0-0001 Infarct size 3-20 Temperature Leucocytosis 14-54 <0-0001 1-50 0-64 0-0192 Outcome -3.45 0-0024 Temperature Stroke severity 1-13 0-55 0-04 <0-0001 Values of significance, regression estimate, and standard error are given for Covariates which reached significance (p<0-05). Values of adjusted R for stroke severnty was 0-25, for outcome 0-47, and for infarct size 0-14.
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Transcribed Image Text:Varlable Covariate Coeff (b) SE (b) Stroke severity Temperature Male 0-0085 0-0050 -3.70 1-40 4-68 1-66 Previous stroke -4-56 1-91 0-0175 Atrial fibrillation -5-07 2-05 0-0138 -1-21 <0-0001 Leucocytosis Infections 0-28 -10-74 2-43 <0-0001 Infarct size 3-20 Temperature Leucocytosis 14-54 <0-0001 1-50 0-64 0-0192 Outcome -3.45 0-0024 Temperature Stroke severity 1-13 0-55 0-04 <0-0001 Values of significance, regression estimate, and standard error are given for Covariates which reached significance (p<0-05). Values of adjusted R for stroke severnty was 0-25, for outcome 0-47, and for infarct size 0-14.
Expert Solution
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Step 1

The dependent variable is a variable that changes depending on the value of another variable. 

The independent variables are the variables that are manipulated by researcher to study its effect on the dependent variable.

For the first part of table, stroke severity is a dependent variable that depends on many other variables as temperature, male, previous stroke atrial fibrillation, leucocytosis and infections, thus all these variables are independent variables. 

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