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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Statistics - Stage 3

### Statistics Short Problems - Age 11-14

### Substitution Cipher

### Olympic Records

### In the Bag

### Half a Minute

### Reaction Timer

### M, M and M

### How Would You Score It?

### About Average

### Unequal Averages

### What's the Weather Like?

### Estimating Time

### Who's the Best?

### Litov's Mean Value Theorem

### Statistical Shorts

### Wipeout

### Searching for Mean(ing)

### Tree Tops

Y*ou may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.*

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Age 11 to 14

A collection of short Stage 3 problems on statistics.

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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?

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

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

Age 11 to 14

Challenge Level

Which countries have the most naturally athletic populations?

Age 11 to 14

Challenge Level

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

Age 11 to 16

Challenge Level

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

Age 11 to 16

Challenge Level

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

Age 11 to 16

Challenge Level

If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?

Age 14 to 16

Challenge Level

Can you make sense of information about trees in order to maximise the profits of a forestry company?

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