# Soft Drinks

Pupils compare two sets of data with different sample sizes and consider how the testing procedure could be improved.

# Practical details

Suitability
National Curriculum levels 5 to 6
Time
30 minutes to 1 hour
Resources
Ruler, pencil, calculator and 1 cm squared paper

# Key Processes involved

Representing
Understand why the tests were unfair and find a way to compare the data
Analysing
Calculate to make comparisons possible
Interpreting and evaluating
Explain how their results show that teenagers do not like the drink, but that adults do; suggest ways to make future tests fairer
Communicating
Show clearly what they have done and explain their ideas well

# Teacher guidance

Check that pupils understand the context, for example with questions such as:

• What does it mean ‘to defend your conclusion’?
• What does ‘reliable’ mean when we are talking about statistics?
• Show all your working so that the Pop Soda Company can understand your thinking.

Pupils can tackle this task in different ways, but they might be expected to:

• produce comparable statistics from the two sets of data,
• understand the shortcomings of the tests and suggest improvements