Nine students held their breath, once after breathing normally and relaxing for one minute, and once after hyperventilating for one minute. The table indicates how long (in sec) they were able to hold their breath. Is there an association between the two variables? Subject A B C D E F G H I Normal 56 56 65 65 50 25 87 44 35 Hypervent 87 91 85 91 75 28 122 66 58
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.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
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 predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
Nine students held their breath, once after breathing normally and relaxing for one
minute, and once after hyperventilating for one minute. The table indicates how long (in
sec) they were able to hold their breath. Is there an association between the two
variables?
Subject A B C D E F G H I
Normal 56 56 65 65 50 25 87 44 35
Hypervent 87 91 85 91 75 28 122 66 58
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