Cumulative frequency

What you'll learn

1. 1

   Cumulative frequency is a running total — you add each new value to the ones before it.

2. 2

   If the first 5 people arrive, then 3 more, what is the cumulative frequency?

3. 3

   Drag the dots to build the cumulative frequency for this data: 3, 5, 2, 4.

4. 4

   Here's how to find the median using cumulative frequency.

5. 5

   Now find the median for this data using the cumulative frequency.

6. 6

   What is the median if cumulative frequencies are 5, 12, 20, 30 and total is 30?

7. 7

   Cumulative frequency always goes up or stays the same — never down. True or false?