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Stats Chapter 7


scatterplots shows the relationship between two quantitative variables measured on the same cases
association direction: positive direction or association means that in general as one variable increases so does the other; form: most straight, strength: strong if there is little scatter around the underlying relationship
outlier a point that does not fit the overall pattern seen in the scatterplot
response variable, explanatory variable, x variable, y variable assign to the y axis the response variable tat is wished to be understood, x axis is the explanatory or predictor variable
correlation coefficient numerical measure of the direction and strength of a linear association
lurking variable a variable other than x and y that simultaneously affects both variables, accounting for the correlation between the two
Created by: 697421973