Notes
Chapter 1 - Data Collection
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Page 1
Learning Objectives - What to get out of this chapter
Understand ‘population’, ’sample’ and ‘census’, and comment on their advantages + disadvantages
Understand advantages + disadvantages of ‘Simple random sampling’, ‘Systematic sampling’, ‘Stratified sampling’, ‘Quota sampling’ and ‘Opportunity sampling’
Define qualitative, Quantitative, discrete and continuous data + understand grouped data
Understand large data set + how to collect data from it + identify types of data and calculate simple statistics
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1.1 - Population and Samples
Population and Samples
A Population = A whole set of items that are of interest
A Census = measures every member of a population
A Sample = measures only a big selected group from a population
Page 3
1.2 - Sampling
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- Description
- Understand ‘population’, ’sample’ and ‘census’, and comment on their advantages + disadvantages Understand advantages + disadvantages of ‘Simple random sampling’, ‘Systematic sampling’, ‘Stratified sampling’, ‘Quota sampling’ and ‘Opportunity sampling’ Define qualitative, Quantitative, discrete and continuous data + understand grouped data Understand large data set + how to collect data from it + identify types of data and calculate simple statistics
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