![Half a minute](/sites/default/files/styles/medium/public/thumbnails/content-id-10999-icon.png?itok=_JHHaVAT)
Measures of spread
![Half a minute](/sites/default/files/styles/medium/public/thumbnails/content-id-10999-icon.png?itok=_JHHaVAT)
![About Average](/sites/default/files/styles/medium/public/thumbnails/content-id-10995-icon.png?itok=YMXj_aLy)
problem
About Average
Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?
![May the best person win](/sites/default/files/styles/medium/public/thumbnails/content-id-7887-icon.jpg?itok=jhC98myx)
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?
![David and Goliath](/sites/default/files/styles/medium/public/thumbnails/content-id-7360-icon.png?itok=u0GaWSNB)
![How would you score it?](/sites/default/files/styles/medium/public/thumbnails/content-id-6957-icon.png?itok=nYlVH8au)
![Maximum Scattering](/sites/default/files/styles/medium/public/thumbnails/content-id-4931-icon.png?itok=-PSAF-53)
problem
Maximum Scattering
Your data is a set of positive numbers. What is the maximum value
that the standard deviation can take?
![Spread](/sites/default/files/styles/medium/public/thumbnails/content-id-2776-icon.png?itok=332T_zEG)
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%?