Data and Surveys
Year 6 students plan, conduct, and interpret surveys, display data in appropriate graphs, and identify variation and potential sources of bias.
What You Need to Know
Key Concept Diagram
Survey questions should be clear, unbiased, and offer a suitable range of response options
The choice of graph depends on the type of data — categorical data suits bar or pie charts; numerical data suits line graphs or histograms
Sample size affects reliability — larger samples generally give more trustworthy results
Outliers are data values that are much higher or lower than the rest and can skew interpretation
Key Vocabulary
Survey
A method of collecting data by asking a group of people questions
Bias
A tendency in data collection that produces results that do not fairly represent a population
Sample
A smaller group chosen from a population to represent the whole
Outlier
A data value that lies far away from most other values in a dataset
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which graph is most suitable for showing how many students chose each favourite colour?
Question 2
A survey asks "Don't you agree our school canteen is great?" This question is an example of:
Question 3
A dataset is: 12, 14, 13, 15, 14, 12, 89. Which value is an outlier?
Key Concepts Summary
- ●Survey questions should be clear, unbiased, and offer a suitable range of response options
- ●The choice of graph depends on the type of data — categorical data suits bar or pie charts; numerical data suits line graphs or histograms
- ●Sample size affects reliability — larger samples generally give more trustworthy results
- ●Outliers are data values that are much higher or lower than the rest and can skew interpretation