Statistics · Module 2 · Describing data: graphs, center and spread

Descriptive Walkthrough

Watch a list of numbers turn into graphs, then learn the summaries every statistician uses: mean, median, mode, percentiles, box plots, the IQR outlier rule, variance and standard deviation. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · Statistics Study Tools · CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Practice next in the Descriptive Lab. All data sets are made-up practice numbers. Quartiles use the median-of-halves method; some calculators use a slightly different rule. Dots are data values, pink triangles mark the mean and teal lines mark the median.