Suppose you survey 50 people and measure their height (inches) and wingspan (inches). You use this information to calculate the correlation between height and wingspan. Which of the following would change the value of the correlation? a. Recording the height in centimeters instead of inches b. Adding a new data point that is an extreme trend outlier c. Switching which variable is the explanatory variable and the response variable d. More than one of the above e. None of the above
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.
Suppose you survey 50 people and measure their height (inches) and wingspan (inches). You use this information to calculate the
| a. |
Recording the height in centimeters instead of inches |
|
| b. |
Adding a new data point that is an extreme trend outlier |
|
| c. |
Switching which variable is the explanatory variable and the response variable |
|
| d. |
More than one of the above |
|
| e. |
None of the above |
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