Edexcel AS Level Maths Statistics
Population correct answers The whole set of items that are of interest
Census correct answers Observes or measures every member of a
population Advantages of a census correct answers It should give a
completely accurate result
Disadvantage of a census correct answers Time consuming and
expensive Hard to process large quantity of data
Sample correct answers A selection of observations taken from a
subset of the population which is used to find out information about
the population as a whole
Advantages of a sample correct answers Less time
consuming Fewer people have to respond
Less data than a census
Disadvantage of a sample correct answers The data may not be as
accurate The data may not be large enough toggle information
about the population
Sampling Units correct answers Individual units of a population
Sampling Frame correct answers A list of individually named or numbered
sampling units
Simple Random Sample correct answers A sample where every sampling
unit has an equal chance of being chosen
Advantages of Simple Random Sample correct answers Free
of bias Easy and cheap to implement
Each sampling unit has equal chance of selection
Disadvantage of Simple Random Sample correct answers A sampling frame
is needed Not suitable when the population size is very big
Systematic Sampling correct answers A method of sampling where
the required elements are chosen at regular intervals from an ordered
list
Advantages of Systematic Sampling correct answers Simple and
quick to use Suitable for large samples
Population correct answers The whole set of items that are of interest
Census correct answers Observes or measures every member of a
population Advantages of a census correct answers It should give a
completely accurate result
Disadvantage of a census correct answers Time consuming and
expensive Hard to process large quantity of data
Sample correct answers A selection of observations taken from a
subset of the population which is used to find out information about
the population as a whole
Advantages of a sample correct answers Less time
consuming Fewer people have to respond
Less data than a census
Disadvantage of a sample correct answers The data may not be as
accurate The data may not be large enough toggle information
about the population
Sampling Units correct answers Individual units of a population
Sampling Frame correct answers A list of individually named or numbered
sampling units
Simple Random Sample correct answers A sample where every sampling
unit has an equal chance of being chosen
Advantages of Simple Random Sample correct answers Free
of bias Easy and cheap to implement
Each sampling unit has equal chance of selection
Disadvantage of Simple Random Sample correct answers A sampling frame
is needed Not suitable when the population size is very big
Systematic Sampling correct answers A method of sampling where
the required elements are chosen at regular intervals from an ordered
list
Advantages of Systematic Sampling correct answers Simple and
quick to use Suitable for large samples
