POL232H1 Lecture Notes - Lecture 4: Scatter Plot, Linear Regression, Descriptive Statistics
Document Summary
Negative relationship: x and y move in opposite directions. Positive relationship: x and y move in the same direction. No relationship: cluster, no line of best fit. Visualization of the joint distribution of y and x. Useful when both y and x are interval quantitative variables with many values. Satisfied with government: how satisfied are you with the performance of the federal government under. Adds small random noise to each observation. Mosaic plot: useful visualization when both y and x are categorical variables. Independent variable: perception of economy // dependent variable: vote intention. Independent variable: perception of economy // dependent variable: feeling thermometer. Shows how the values of y tend to change as the value of x changes. Boxplots: show conditional distributions and conditional medians. Conditional means: means of y conditional on the values of x. Shows how the value of y changes, on average, as the value of x changes.
