Before conducting inference for regression slope we needto check several assumptions by looking at the residuals.Which of these is important?I. The residual plot should not have observablepatterns.II. The residuals should have a fairly consistent verticalspread.III. The distribution of residuals should be approximatelynormal.A) III only B) I and II onlyC) I and III only D) II and III onlyE) I, II, and III
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.
Before conducting inference for regression slope we need
to check several assumptions by looking at the residuals.
Which of these is important?
I. The residual plot should not have observable
patterns.
II. The residuals should have a fairly consistent vertical
spread.
III. The distribution of residuals should be approximately
normal.
A) III only B) I and II only
C) I and III only D) II and III only
E) I, II, and III
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