When computing a confidence interval for the slope of a regression line, a plot of the residuals versus the fitted values can be used to check which of the following conditions? The variables x and y are inversely related. The variables x and y are inversely related. A The standard deviation of y does not vary as x varies. The standard deviation of y does not vary as x varies. B The correlation is not equal to zero. The correlation is not equal to zero. C The observations are independent. The observations are independent. D The confidence interval contains zero.
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.
When computing a confidence interval for the slope of a regression line, a plot of the residuals versus the fitted values can be used to check which of the following conditions?
-
The variables x and y are inversely related.
The variables x and y are inversely related.A -
The standard deviation of y does not vary as x varies.
The standard deviation of y does not vary as x varies.B -
The
correlation is not equal to zero.The correlation is not equal to zero.C -
The observations are independent.
The observations are independent.D -
The confidence interval contains zero.
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