Flashcards
data collection
Cards in this deck (9)
- 1what is a censusa census observes or measures every member of a population
- 2what is a samplea sample is a selection of observations taken from a subset of the population which is used to find out information about the population as a whole
- 3what are the advantages of a census-it should give a completely accurate result
- 4what are the disadvantages of a census-time consuming and expensive
-cant be used when testing process destory's the item
-hard to process large quantity of data - 5what are the advantages of sampling-less time consuming/expensive than a census
-few people have to respond
-less data to process than a census - 6what are the disadvantages of sampling-data may not be accurate
-sample may not be large enough to give info about small subgroups of the population - 7what are some general facts about sampling-generally the larger the sample the more
accurate it is
-if the population is very varied you need a larger sample than if the
population were uniform
-different samples can lead to different conclusions due to natural variation in a population - 8what are sampling unitsindividual units of a population
- 9—
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- A level Maths (Statistics) Flashcards on data collection, created by Troy Campbell on 14/07/2018.
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- Troy Campbell
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