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🗂️ Charts and Frequency Tables

Build frequency tables, bar charts, pie charts, and pictographs — including grouped tables for messy real-world data — and choose the right chart for the job.

3
lessons
~15 min
to learn
🔢 Math
subject
Ages 6–12
level
Start the course →

What you’ll learn

  1. Frequency TablesConstruct and read a frequency table.A frequency table records how often each value or category occurs. You tally the data, then total the frequencies — which should add up to the number of items counted. The frequency table is the starting point for building any chart.
  2. Turning Tables Into ChartsTurn a frequency table into bar charts, pie charts, and pictographs.The same frequencies can be shown many ways: bar charts to compare category counts, pie charts to show each category's share of the whole, and pictographs to display counts with symbols and a key. The chart you choose depends on the question you're answering.
  3. Grouped Data and Choosing a ChartBuild grouped frequency tables and choose an appropriate chart.Continuous data like heights rarely repeats, so we group values into equal class intervals and count how many fall in each; a histogram then shows the shape of that grouped data. Choosing the right chart — bar, pie, histogram, or pictograph — depends on the data type.

Questions this course answers

A frequency table shows:

Frequency is a count of how many times each category appears.

To compare the counts of separate categories, the everyday choice is a:

Bar charts compare category counts directly.

To show each category's share of the whole, use a:

Pie charts display parts of a whole as slices.

Continuous data like heights is best organised using:

Grouping continuous data into intervals reveals its shape.

A histogram is the right chart for showing:

Histograms display the distribution of grouped numerical data.

Grounded in trusted sources

  • BBC Bitesize — Maths
  • Khan Academy — Math
  • NCTM — Illuminations

Every Wunder lesson is built from real, reputable sources — never invented.

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