May 2026 CPHQ Prep Virtual Class-CPHQ Virtual Live Review Course

CPHQ Virtual Live Review Course | Video: Scatter Diagrams

Video Transcription

Video Summary

A scatter diagram (scatter plot) is an X‑Y graph used to explore the possible relationship (correlation) between two variables. Each dot represents paired data for the same subject, with the independent “driver” on the X axis and the dependent “follower” on the Y axis. To create one, define a question, collect meaningful paired samples (often 50+ points), scale axes to the data range, and plot all points. Patterns indicate correlation: upward trend = positive, downward = negative, no pattern = none; relationships can be non‑linear. Outliers and stratifying by groups can reveal important insights about potential cause-and-effect.

Keywords

scatter plot

correlation analysis

independent and dependent variables

data visualization

outliers