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Beschreibung
Quiz von Bradford Richard, aktualisiert more than 1 year ago
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Erstellt von Bradford Richard
vor etwa 8 Jahre
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Frage 1
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When we study the relationship between two variables we refer to the data as
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Tri-variate
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regression
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dependant variable
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b-variate
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A _______ diagram is a chart that portrays the relationship between two variables.
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Scatter
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Line
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X-Y
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Grid
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DEPENDENT VARIABLE
The variable that is being predicted or estimated. It is scaled on the
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b variable
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a variable
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Y-Axis
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X-Axis
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INDEPENDENT VARIABLE
The variable that provides the basis for estimation. It is the predictor variable.
It is scaled on the
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a variable
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b variable
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Y-Axis
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X-Axis
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In ________ _________ we use the independent variable (X) to estimate the dependent variable (Y):
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Regression Analysis
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Confidence Interval
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Coefficient of Correlation
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Coefficient of Determination
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An equation that expresses the linear relationship between two variables.
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Regression Equation
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Bi-variate Equation
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Coefficient of correlation Equation
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Coefficient of determination Equation
Frage 7
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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...
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Least squares principle
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standard error of estimate
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confidence interval
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prediction interval
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__ is the predicted value of theY variable for a selected X value.
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Y'
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ß
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Se
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r
Frage 9
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is the Y-intercept. It is the estimated value of Y when
X = 0.
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a
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b
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X
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Y'
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___ 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.
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a
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b
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Y'
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X
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_____________ measures the scatter, or dispersion, of the observed values around the line of regression.
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standard error of estimate
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prediction interval
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Coefficient of correlation
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Coefficient of determination
Frage 12
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We model the linear relationship in the population by the equation:
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Y=a+b
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Y'=a+bx
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Yʹ′±tSe
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X=Y'-b
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