True or false: (d) The non-parametric tests make certain assumptions about underlying population distributions. (e) In linear regression model, when a categorical variable has 5 different levels, four dummy variables will be needed. (1) What does heteroscedasticity mean? (multiple choice) The variance in the residuals are the same regardless of their predicted values. There is variance in the residuals That we are unable to produce residuals The variance in the residuals differ depending on their predicted values
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.
True or false:
(d) The non-parametric tests make certain assumptions about underlying population distributions.
(e) In linear regression model, when a categorical variable has 5 different levels, four dummy variables will be needed.
(1) What does heteroscedasticity mean? (multiple choice)
- The variance in the residuals are the same regardless of their predicted values.
- There is variance in the residuals
- That we are unable to produce residuals
- The variance in the residuals differ depending on their predicted values
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