GRAPHS AND STATISTICS

Carroll Diagrams

Learn the reliable method for carroll diagrams, then apply it to 11+ exam-style questions.

1 · WHAT YOU NEED TO KNOW

The idea

Carroll Diagrams questions test how accurately you read, summarise and compare data.

Picture itRead the row and column together
2 · THE METHOD

Follow these steps

  1. Read the title, labels, key and scale.
  2. Extract only the values needed.
  3. Apply the correct statistic or comparison and check the unit.
3 · WORKED EXAMPLES

See the method in action

Example 1

Each cell gives the number of cards in that group. How many cards show even numbers?

  1. The even column contains 4 and 3, so 4 + 3 = 7.
Answer: 7
Example 2

Each cell gives the number of cards in that group. How many cards show even numbers?

  1. The even column contains 5 and 4, so 5 + 4 = 9.
Answer: 9
4 · ELEVENSPRINT TIP

A useful shortcut

Read the scale before reading any bar, point or symbol.

5 · COMMON MISTAKES

Watch out for these

Counting symbols instead of using the key

Multiply the number of symbols, including partial symbols, by the key value.

6 · TRY IT YOURSELF

Three fresh questions

Ready to check the method? You will get three fresh, validated questions.