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Homework Answers

Homework Answers. To Worksheet X in the booklet. Data Collection Methods. Aims: To know the advantages and disadvantages of different sampling techniques and be able to apply them to the Geography IA. Recap….

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Homework Answers

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  1. Homework Answers • To Worksheet X in the booklet

  2. Data Collection Methods Aims: To know the advantages and disadvantages of different sampling techniques and be able to apply them to the Geography IA

  3. Recap… • We need to find out how the height of buildings (number of floors) changes as you move from the PLVI to the rural-urban fringe in HK • What PLVI shall we use? How did you decide? • Last lesson we agreed on 3 transects through HK (we’ll see them later) • When going along the transects how should we select buildings to include in our sample?

  4. Random Sampling • In a random sample every building in the study area has an equal chance of being picked. • So is probably not as simple as you might think • You would first need to identify each building in the sample area, allocate it a number and then pull out the numbers at random

  5. Random Sampling • What are the benefits and problems of using this technique?

  6. Systematic Sampling • Systematic sampling is when buildings are chosen at regular intervals, e.g. every 400m • What are the benefits and problems of this option – specifically for our study?

  7. Stratified Sampling • If you know there are important sub-groups in the sample area (e.g. CBD, inner city, inner suburbs, etc) you can select a sample that ensures each sub-group is represented fairly • What are the benefits and problems of using this technique?

  8. Finalising our Method • The three transects are:

  9. Transect 1: Nathan Road

  10. Transect 2: Chatham Road

  11. Transect 3: Queensway

  12. However… • How should we select which buildings to count in our sample? • Now let’s organise you into groups and decide which transect you will work on • Before we finalise the details, how many buildings will we need in our sample to make it statistically reliable?

  13. To the computer room… • What we need to decide: • How far is it from one end of the transect to the other? • How many intervals should you have? • Therefore, how far apart will the intervals be? • Therefore, specifically, where will the intervals be? • How many buildings either side of the transect should we include in the sample? • How should we decide which buildings?

  14. Homework • Complete Worksheet X in the booklet by next lesson

  15. What do the pictures mean? You can discuss the work I’m teaching – listen! Work in silence Try to answer questions if you can Work in a group

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