This article explores the process of making and testing hypotheses.

A random ramble for teachers through some resources that might add a little life to a statistics class.

Like all sports rankings, the cricket ratings involve some maths. In this case, they use a mathematical technique known as exponential weighting. For those who want to know more, read on.

Can you decide whether these short statistical statements are always, sometimes or never true?

Charlie has moved between countries and the average income of both has increased. How can this be so?

Match the cumulative frequency curves with their corresponding box plots.

Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?

Imagine you have a large supply of 3kg and 8kg weights. How many of each weight would you need for the average (mean) of the weights to be 6kg? What other averages could you have?

Here is the start of a six-part challenge. Can you get to the end and crack the final message?

Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?

Infographics are a powerful way of communicating statistical information. Can you come up with your own?

How well can you estimate 10 seconds? Investigate with our timing tool.

If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?

This short article gives an outline of the origins of Morse code and its inventor and how the frequency of letters is reflected in the code they were given.

Play around with sets of five numbers and see what you can discover about different types of average...

You may like to read the article on Morse code before attempting this question. Morse's letter analysis was done over 150 years ago, so might there be a better allocation of symbols today?

Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...

Design and test a paper helicopter. What is the best design?

Which countries have the most naturally athletic populations?

This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.

What happens to the average if you subtract 8 from all of the numbers?

Can you do a little mathematical detective work to figure out which number has been wiped out?

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

With access to weather station data, what interesting questions can you investigate?

Find the frequency distribution for ordinary English, and use it to help you crack the code.

How can we make sense of national and global statistics involving very large numbers?

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

Can you deduce which Olympic athletics events are represented by the graphs?

Can you guess the colours of the 10 marbles in the bag? Can you develop an effective strategy for reaching 1000 points in the least number of rounds?

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