Handling data

1
Handling data

• Using surveys

2
What does a good survey do?

• Gathers information.
• Keeps information in categories.
• Makes information easy to use at a later date.

3
Which is a better question?

• I want to know what washing up liquid people use.
• Should I ask
• Do you use fairy washing up liquid?
• Which brand washing up liquid do you use?

4
Good or bad question?

• I want to know if people have seen the film
  Casino Royale.
• Do you like James Bond films?
• Did you see the film Casino Royale?

5
Good or bad question?

• I want to know what the weather was like
  yesterday.
• What was the weather like?
• good ok rubbish
• What was the weather like?
• sunny raining windy dry

6
Do you have a better suggestion?

• I want to know how many hours people play
  computer games in a week.
• Question How many hours do you play computer
  games?

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7
Do you have a better suggestion?

• I want to know how people travel to work.
• Question Do you travel to work by car?

8
Design your own questions.

• I want to know about peoples holiday choices.
• Things to include
• Age of person.
• Destination.
• People who went.
• How long they went for.
• When they went.
• Type of accommodation.

9
Using surveys

• When using a survey it is important to follow a
  few rules to make your results as useful as
  possible.
• Use random sampling.
• Location of survey.
• Age of people.

10
Using a survey

• You are investigating which computer games
  children like best.
• Where would you do your survey?
• Would you ask every fifth person?