Quick Lesson
YEAR 7 STATISTICS & AVERAGES
Statistics & Averages
Interpreting charts means reading bar charts, pictograms and tables to answer questions.
What does this mean?
Interpreting charts means reading bar charts, pictograms and tables to answer questions. You use the scale and labels to find the values.
Key words:
- Average A single value that stands for a whole set. Usually the mean: mean = total of the values ÷ how many values.
- Data Facts or measurements that have been collected.
- Frequency How many times something happens.
- Mean Add all the values, then divide by how many there are: mean = total ÷ number of values.
The key rule
Read the title, labels and scale first.
In words:
- Find the value each bar or picture shows.
- Compare the categories to answer the question.
Remember
Check what each square on the scale is worth.