Chapter 14 Flashcards
what is a normal probability plot?
a graph that plots observed data versus norma scores
What is a scatter diagram
a graph of bivariate data in which the independent variable is on the horizontal axis and the dependent variable is on the vertical axis
what is an outlier
a data point that does not fit the observation
what is an ANOVA table?
analysis of variance table used to summarize the computations associated with the F test for its significance
residual plot
a graphical representation of the residuals that can be used to determine in whether the assumptions of the regression analysis is true
independent variable
a variable that is doing the predicting or explaining denoted by x
dependent variable
the variable being explained denoted by y
ith residual
the difference between the observed independent variable value and the value predicted using the estimated regression equation
high leverage points
observations with extreme values for independent variables
regression model
the equation that describes how y is related to x and the error term
residual analysis
analysis of the residuals used to determine if the assumptions made about the regression model are true
regression equation
an equation that describes how the mean or expected value of the dependent variable is related to the independent variable
standard error estimate
the square root of the mean square error denoted by s
simple linear regression
a regression analysis involving the relations between one independent and dependent variable shown on a straight line
standardized residual
the value obtained by dividing a residual by its standard deviation
