Author note — to cover

Locate the median from an ungrouped frequency table: find the middle position from the total frequency, then count cumulatively through the rows without rewriting the list. Cover odd and even totals. Grouped data yields only a median class, a separate page; cumulative frequency curves are Higher, on Presenting data. Both tiers. (S4)

Introduction

—coming soon—

Practice and continue

Practice

The median from a frequency table

Counting through the frequencies to the middle, without rewriting the list.

Next lesson

Mode and range from a frequency table

Both read from the value column, not from the largest frequency.