Twenty different statistics students are randomly selected. For each of them, their body temperature (°C) is measured and their head circumference (cm) is measured. If it is found that r=0, does that indicate that there is no association between these two variables? Choose the correct answer below. A. No, because r does not measure the strength of the relationship, only its direction. B. No, because if r=0, the variables are in a perfect linear relationship. C. Yes, because if r=0, the variables are completely unrelated. D. No, because while there is no linear correlation, there may be a relationship that is not linear.
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.
does that indicate that there is no association between these two variables?
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