Statistics - Stage 3

Substitution Cipher

Stage: 3 Challenge Level: Challenge Level:1

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

Reaction Timer

Stage: 3 Challenge Level: Challenge Level:1

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

Who's the Best?

Stage: 3 and 4 Challenge Level: Challenge Level:1

Which countries have the most naturally athletic populations?

Olympic Records

Stage: 3 Challenge Level: Challenge Level:1

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

Statistical Shorts

Stage: 3 and 4 Challenge Level: Challenge Level:1

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

Retiring to Paradise

Stage: 3 Challenge Level: Challenge Level:1

When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?

Statistics Stage 3 - Short Problems

Stage: 3

A collection of short Stage 3 problems on statistics.

Estimating Time

Stage: 3, 4 and 5 Challenge Level: Challenge Level:1

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

The Lives of Presidents

Stage: 3 and 4 Challenge Level: Challenge Level:1

Do Presidents of the USA live longer now than in the past?

Acceptance Rate

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

Can you work out how many students applied to a school, if you know about how the mean number of students has changed?

Mean Median

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

Can you work out the median weight of these children from the given means?

Mean Balance

Stage: 3 Short Challenge Level: Challenge Level:1

Given information about the mean, can you work out the missing numbers?

Mean Square

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

Can you fill this square so that the number in the middle of each line is the mean of the two numbers on either side of it?

A Mean Calculation

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

What is the mean of this set of numbers?

Committees

Stage: 3 Short Challenge Level: Challenge Level:2 Challenge Level:2

In a club, there are four committees, which are organised according to some rules. How many people are there in the committee?

Choose the Mean

Stage: 3 Short Challenge Level: Challenge Level:1

Find 4 numbers which have a mean of 7, a median of 8 and a mode of 9.