Statistics

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

Finding the median

The median is the middle value in a set of

Calculating the mean

Calculating the mean, or average, is a useful skill in