STAT 3615 Lecture Notes - Lecture 7: Squared Deviations From The Mean, Standard Deviation, No Trend
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Otherwise, s > 0: s is affected by outliers and skewness, s have the same units of measurement as the original observations. New types of variables: a response variable measures or records an outcome of a study. (also: y, dependent variable, predicted variable, an explanatory variable explains changes in the response variable. (also: x, independent variable, predictor variable) Scatterplots: a scatterplot is a graph displaying the relationship between two quantitative variables measured on the same set of individuals. If appropriate: response variable on y-axis, explanatory variable on x-axis, each individual in the dataset appears as a point in the plot. Strength of an association: scatterplots with large amounts of scatter or vertical variation indicate a weak association, scatterplots with small amounts of scatter or little vertical variation indicate a strong association. Outliers: an outlier in two-variable analysis is a point that falls outside the overall pattern of the relationship.
