Learn By Doing – Comparing Distributions with Boxplots
- to practice comparing and contrasting distributions, and
- to help you gain more intuition about variability through the interpretation of your results in context.
The percentage of each entering freshman class that graduated on time was recorded for each of six colleges at a major university over a period of several years. (Source: This data is distributed with the software package, Data Desk. (1993). Ithaca, NY: Data Description, Inc., and appeared in the Data and Story Library)
In order to compare the graduation rates among the different colleges, we will create side-by-side boxplots (graduation rate by college), and supplement the graph with numerical measures. Answer the questions based on the SPSS output provided.
This document is linked from Boxplots.