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# MATH 153 Chapter 4

### Correlation/Scatter Plots & Linear Regression

A Scatter Plot graphs compares the relationship between two ____________ variables Continuous
True or​ false: Correlation implies causation. False
If the linear correlation between two variables is​ negative, what can be said about the slope of the regression​ line? a. Positive b. Negative c. More information is needed b. Negative
True or false: The​ least-squares regression line always travels through the point (x bar, y bar). True
A ____________ is the difference between an observed value of the response variable y and the predicted value of y. Residual
True or false: If the residual is​ positive, then the observed value is greater than the predicted value. True
The​ _______, R2​, measures the proportion of total variation in the response variable that is explained by the least squares regression line. coefficient of determination
A __________________ is a frequency or relative frequency distribution of either the row or column variable in a contingency table. marginal distribution
A ___________________ lists the relative frequency of each category of the response​ variable, given a specific value of the explanatory variable in a contingency table. conditional distribution
A straight line that represents how the response variable changes as the explanatory variable changes. Regression Line
The difference between observed value and mean values in the response variable is called? Total deviation
The outcome of a study is the ____________. Response Variable.