1. 1 Press Ctrl-A ©G Dear 2010 – Not to be sold/Free to use Collecting Data Stage 6 - Year 11 Applied Mathematic (Preliminary General 1)

2. 2 2.Collecting Data a) Collect the data yourself i)Observations ii)Questionnaire b) Use data collected by someone else. i)Online databases ii)Almanacs Internal External You can:

3. 3 2.Collecting Data Are the following examples Internal or External? a) A class survey on eating carrots.Internal b) Deaths on Australian roads.External c) Number of marriages in NSW.External d) Red cars passing our school in 1 hour.Internal e) Price of houses in our town.External Click 4 Answer

4. 4 2.Collecting Data Which would you use, Observation or Questionnaire? a) A school survey on uniform design.Questionnaire b) Number of girls using the canteen.Observation c) Number of student out of uniform.Observation d) Red cars passing our school in 1 hour.Observation e) Favourite coloured car.Questionaire Click 4 Answer