# Measures of spread

**7**NRICH Mathematical resources connected to

**Measures of spread**

problem

### About Average

Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?

article

### May the best person win

How can people be divided into groups fairly for events in the Paralympics, for school sports days, or for subject sets?

problem

### Maximum Scattering

Your data is a set of positive numbers. What is the maximum value
that the standard deviation can take?

problem

### Spread

Given the mean and standard deviation of a set of marks, what is
the greatest number of candidates who could have scored 100%?