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There are **7** NRICH Mathematical resources connected to **Measures of spread**, you may find related items under Handling, processing and representing data.

Problem
Primary curriculum
Secondary curriculum
### Half a Minute

Anna, Ben and Charlie have been estimating 30 seconds. Who is the best?

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### About Average

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

Age 11 to 14

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### How Would You Score It?

Invent a scoring system for a 'guess the weight' competition.

Age 11 to 14

Challenge Level

Article
Primary curriculum
Secondary curriculum
### 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?

Age 5 to 16

Problem
Primary curriculum
Secondary curriculum
### Maximum Scattering

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

Age 16 to 18

Challenge Level

Problem
Primary curriculum
Secondary curriculum
### Spread

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

Age 16 to 18

Challenge Level