Comparing and interpreting data

problem
A population survey

Age

14 to 18

Challenge level

A geographical survey: answer the tiny questionnaire and then analyse all the collected responses...
problem
Do you brush your teeth every day?

Age

14 to 18

Challenge level

How can we find out answers to questions like this if people often lie?
problem
Sleep: the silent killer

Age

16 to 18

Challenge level

"Too much sleep is deadly" proclaimed the newspaper headline. Is this true?