When we study the relationship between two variables we refer to the data as
Tri-variate
regression
dependant variable
b-variate
A _______ diagram is a chart that portrays the relationship between two variables.
Scatter
Line
X-Y
Grid
DEPENDENT VARIABLE The variable that is being predicted or estimated. It is scaled on the
b variable
a variable
Y-Axis
X-Axis
INDEPENDENT VARIABLE The variable that provides the basis for estimation. It is the predictor variable. It is scaled on the
In ________ _________ we use the independent variable (X) to estimate the dependent variable (Y):
Regression Analysis
Confidence Interval
Coefficient of Correlation
Coefficient of Determination
An equation that expresses the linear relationship between two variables.
Regression Equation
Bi-variate Equation
Coefficient of correlation Equation
Coefficient of determination Equation
Determining a regression equation by minimizing the sum of the squares of the vertical distances between the actual Y values and the predicted values of Y is known as the...
Least squares principle
standard error of estimate
confidence interval
prediction interval
__ is the predicted value of theY variable for a selected X value.
Y'
ß
Se
r
is the Y-intercept. It is the estimated value of Y when X = 0.
a
b
X
___ is the slope of the line, or the average change in Y' for each change of one unit (either increase or decrease) in the independent variable, X.
_____________ measures the scatter, or dispersion, of the observed values around the line of regression.
Coefficient of correlation
Coefficient of determination
We model the linear relationship in the population by the equation:
Y=a+b
Y'=a+bx
Yʹ′±tSe
X=Y'-b
