People often wonder which has the greater relationship with body weight, daily calories, or daily exercise. While there are certainly many factors that can affect body weight, these are often the two most investigated. A research group performed a correlation analysis. First, they calculated the correlation between body weight and calorie intake. The r-value was found to be .52. Next, the research group calculated the correlation between hours of exercise per week and body weight. Ther value was - .57. Which statement is FALSE? The correlation between exercise and body weight is weaker than the relationship between calorie intake and body weight. The correlation between body weight and calorie intake is a strong relationship. O The correlation between body weight and exercise is a strong relationship.
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.
Here absolute value of correlation are above 0.5. Thus both the variables have strong correlation with body weight, i.e.,
- The correlation between body weight and calorie intake is a strong relationship.
- The correlation between body weight and exercise is a strong relationship.
Also we observe that the magnitude of correlation between body weight and exercise is greater than that of body weight and calorie intake.
Thus the correlation between body weight and exercise is stronger than the correlation between body weight and calorie intake.
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