Proportions and percentages

The first exercise on this page asks you to evaluate a proportion or percentage based on a data set's cumulative distribution function.

Climate in Samaru, Nigeria

This exercise is based on climate records from 1928 to 1983 about Samaru in Northern Nigeria.

Drag the vertical red line in the graph to find the relevant cumulative proportion, then use the template to answer the question. Repeat with a few different questions.

Rates and return periods

The next exercise includes questions about rates and return periods in addition to ones about proportions and percentages.

Climate in Samaru, Nigeria

Again drag the vertical red line in the graph to find the relevant cumulative proportion, then use the template to answer the question. Repeat with a few different questions.