Year 1 Statistics- Chapter 1: Data Collection, Advantages and Disadvantages

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  • Created by: 13clarken
  • Created on: 02-01-20 10:24
... of a census: It should give a completely accurate result
Advantages
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... of a census: Time consuming and expensive, Cannot be used when the testing process destroys the item, Hard to process large quantity of data
Disadvantages
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... of a sample: Less time consuming and expensive than a census, Fewer people have to respond, Less data to process than in a census
Advantages
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... of a sample: The data may not be as accurate, The sample may not be large enough to give information about small sub-groups of the population
Disadvantages
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... of simple random sampling: Free of bias, Easy and cheap to implement for small populations and small samples, Each sampling unit has a known and equal chance of selection
Advantages
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... of simple random sampling: Not suitable when the population size or the sample size is large, A sampling frame is needed
Disadvantages
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... of systematic sampling: Simple and quick to use, Suitable for large samples and large populations
Advantages
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... of systematic sampling: A sampling frame is needed, It can introduce bias if the sampling frame is not random
Disadvantages
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... of stratified sampling: Sample accurately reflects the population structure, Guarantees proportional representation of groups within a population
Advantages
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... of stratified sampling: Population must be clearly classified into distinct strata, Selection within each stratum suffers from the same disadvantages as simple random sampling
Disadvantages
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... of quota sampling: Allows a small sample to still be representative of the population, No sampling frame required, Quick, easy and inexpensive, Allows for easy comparison between different groups within the population
Advantages
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... of quota sampling: Non-random sampling can introduce bias, Population must be divided into groups, which can be costly or inaccurate, Increasing scope of study increases number of groups, which adds time and expense, Non-responses aren't recorded
Disadvantages
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... of opportunity sampling: East to carry out, Inexpensive
Advantages
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... of opportunity sampling: Unlikely to provide a representative sample, Highly dependent on individual researcher
Disadvantages
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Other cards in this set

Card 2

Front

... of a census: Time consuming and expensive, Cannot be used when the testing process destroys the item, Hard to process large quantity of data

Back

Disadvantages

Card 3

Front

... of a sample: Less time consuming and expensive than a census, Fewer people have to respond, Less data to process than in a census

Back

Preview of the front of card 3

Card 4

Front

... of a sample: The data may not be as accurate, The sample may not be large enough to give information about small sub-groups of the population

Back

Preview of the front of card 4

Card 5

Front

... of simple random sampling: Free of bias, Easy and cheap to implement for small populations and small samples, Each sampling unit has a known and equal chance of selection

Back

Preview of the front of card 5
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