1. © T Madas

2. Amy, Bella and Carie are doing a survey on MP3 players.
They decide to ask people: “Do you own an MP3 player?”
Amy asked her 4 cousins, Bella asked 20 pupils in her class and Carie asked 200 people in her Year.
They used different graphs to display their results. no
yes
Amy
yes no 4 3 2 1
0% % % % % %
yes no
Carie
Bella
1. How many people answered “no” in Amy’s survey?
2. About what percentage answered “yes” in Bella’s survey?
3. What percentage answered “no” in Carie’s survey?
4. What percentage answered “yes” in Amy’s survey?
5. About how many people answered “no” in Bella’s survey?
6. How many people answered “yes” in Carrie’s survey?
7. Whose result is the most reliable and why?
© T Madas

3. © T Madas