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12 Cards in this Set
- Front
- Back
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Opportunity |
Taking a sample from people who are avaliable |
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Random Sampling |
Every member of the population as an equal chance of being chosen |
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Stratified Sampling |
Classifying the population and then choosing participants from different categories in proportion |
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Self selected sampling |
Volunteer sample (advert) |
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Strength of opportunity sampling |
Less time consuming |
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Weakness of opportunity |
May not be a varied sample May be chosen for biased reasons |
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Strength of stratified |
Representative sample Relatively objective |
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Weakness of stratified |
Time- consuming May not be representative |
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Strength of random |
Avoids bias Representative sample |
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Weakness of random |
Time consuming 'Freak' sample - not representative |
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Strength Self- selected sample |
Willing volunteers Not time consuming |
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Weaknesses of self selected |
Biased Not representative |
