Statistics

Analysing grouped frequency tables

When data is grouped into classes – like height ranges or

Analysing frequency tables

When you're looking at a big set of

Stem and leaf diagrams

Stem and leaf diagrams are a handy way to organise

Angles on pie charts

Pie charts are a great way to show how something

Interquartile range

The **interquartile range (IQR)** measures the spread of the middle

Stratified sampling

Stratified sampling is a method used in statistics to ensure

Capture recapture

Estimating total populations using the **capture-recapture** method is a clever

Find a missing value using the mean

Imagine you're planning a group trip and need

Calculating the range

The range is a measure of how spread out a

Finding the mode

The mode is the number or item that appears most