Populations and samples

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In statistics, a population is the whole set of items that are of interest.
A census observes or measures every member of the population
A 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.

1 / 4

Select all the advantages of a sample over a census.

Less time consuming and expensive

Fewer people have to respond

It should give a completely accurate result

Less data to process

2 / 4

Select all the disadvantages of a sample over a census.

The data may not be as accurate

Time consuming and expensive

Cannot be used when the testing process destroys the item.

The sample may not be large enough to give information about small sub-groups of the population

Hard to process large quantity of data.

3 / 4

Select all the disadvantages of a census over a sample.

The data may not be as accurate

Time consuming and expensive

The sample may not be large enough to give information about small sub-groups of the population

Cannot be used when the testing process destroys the item.

Hard to process large quantity of data.

4 / 4

Select all the advantages of a census over a Sample.

Less time consuming and expensive

It should give a completely accurate result

Fewer people have to respond

Less data to process

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