stats 2 chapter 7: linear regression
a variable that takes on the values of 0 or 1 and is used to incorporate the effect of categorical variables in a regression model is colled
a dummy variable
in regression analysis, the variable that is being predicted is the
dependent variable
one of the measures of the accuracy (goodness of fit) of the regression model is called the coefficient of
determination
in regression analysis, y^ = b0 + b1x1 + b2x2 + ...... + bqxq developed from sample data is known as
estimated regression equation
in a regression model involving more than one independent variable, which of the following tests is used to examine the overall significant of the model
f test
the purpose of regression analysis is to
identify the relationship between a dependent variable and one or more independent variables
an estimated regression equation has the form: y^ = 7 +2x1 + 9x2. as x1 increases by 1 unit (holding x2 constant), then y is expected to
increase by two units
in regression analysis, y = Bo + B1x1 + B2x2 + ...... + Bqxq + E is colled
linear regression model
in multiple regression analysis, the correlation among the independent variables is termed
multicollinearity
the standard error of the estimate s is the
square root of mean square error (MSE)
in a regression model, which of the following tests is used in order to determine whether an individual independent variable is significant
t test
the procedure of using sample data to find the estimated regression equation is better known as
the least squares method
in the regression model y=B0 + B1x1 + B2x2 + ...... + Bqxq + E, the standard deviation of the term E is estimated by
the standard error of the estimate s
in multiple regression analysis,
there can be several independent variables, but only one dependent variable
in regression analysis, independent variables are
used to predict the dependent variable
if the confection of determination r^2 is 0.95, then
95% of observed variations in y is explained by the estimated regression equation
in regression analysis, if the coefficient of determination r^2=1, then
SSE must be equal to 0
