11+ Data Handling & Probability Online Tests
Data handling is about reading information from charts, tables and graphs, and summarising it with averages. Probability is about how likely something is, written as a fraction. Both reward careful reading at least as much as calculation.
The 11+ favours bar charts, line graphs, pie charts and two-way tables, usually with a question that requires combining two pieces of information rather than reading off a single value. Mean, median, mode and range appear regularly, and children need to keep the four straight.
21 free Data Handling & Probability tests
Timed and marked instantly, with an explanation for every question. No sign-up needed.
- Data Handling & Probability: Easy Test 1 Easy 15 questions · 15 min
- Data Handling & Probability: Easy Test 2 Easy 15 questions · 15 min
- Data Handling & Probability: Easy Test 3 Easy 15 questions · 15 min
- Data Handling & Probability: Easy Test 4 Easy 15 questions · 15 min
- Data Handling & Probability: Easy Test 5 Easy 15 questions · 15 min
- Data Handling & Probability: Medium Test 1 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 2 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 3 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 4 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 5 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 6 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 7 Medium 15 questions · 15 min
- Data Handling & Probability: Medium Test 8 Medium 15 questions · 15 min
- Data Handling & Probability: Hard Test 1 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 2 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 3 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 4 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 5 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 6 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 7 Hard 15 questions · 15 min
- Data Handling & Probability: Hard Test 8 Hard 15 questions · 15 min
What these Data Handling & Probability tests cover
- Reading bar charts, line graphs, pictograms and pie charts
- Two-way tables, Carroll diagrams and Venn diagrams
- Mean, median, mode and range
- Comparing two sets of data
- Probability written as a fraction
- Listing all possible outcomes systematically
Data Handling & Probability: tips that earn marks
- Read the scale on the axis before anything else. A bar chart going up in 5s or 20s is the most common trap in the topic.
- Median needs the data in order first. Forgetting to sort is the usual reason a median answer goes wrong.
- Range is the largest value minus the smallest - it measures spread, not a typical value.
- Probability is the number of ways it can happen over the total number of outcomes, and every probability lies between 0 and 1.
Questions parents ask about Data Handling & Probability
What is the difference between mean, median and mode?
The mean is the total divided by how many there are. The median is the middle value once they are in order. The mode is the one that appears most often. The range is not an average at all - it is the spread.
Are pie charts tested in the 11+?
Yes, usually by reading proportions rather than measuring angles - for example recognising that a quarter of the circle represents a quarter of the total.
How is probability written in the 11+?
Almost always as a fraction, occasionally as a decimal or percentage. Answers such as 'likely' are only accepted when the question specifically asks in words.