Measures of central tendency, variability, and data description
What is a scatter plot?
A graph in which the values of two variables are plotted along two axes, with each point representing one observation.
Example: Scatter plot of height (x-axis) vs. weight (y-axis) for a sample of people
Note: Reveals relationships, patterns, clusters, and outliers; useful for identifying correlation direction and strength before calculating r. Interpretation tips: look for funnel shapes (heteroscedasticity), clusters (subgroups), and curved patterns (non-linearity).
