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Edexcel AS Level Maths Statistics June 2024 Exam Questions and Answers 100% Pass
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Edexcel AS Level Maths Statistics June 2024 Exam Questions and Answers 100% Pass
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Edexcel AS Level Maths Statistics June2024 Exam Questions and Answers
100% Pass
Population - Answer>>The whole set of items that are of
interest
Census - Answer>>Observes or measures every member of a
population
Advantages of a census - Answer>>It should give a completely
accurate result
Disadvantage of a census - Answer>>Time consuming and
expensive
Hard to process large quantity of data
Sample - Answer>>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 - Answer>>Less time consuming
Fewer people have to respond
Less data than a census
Disadvantage of a sample - Answer>>The data may not be as
accurate
The data may not be large enough toggle information about the
population
Sampling Units - Answer>>Individual units of a population
, Sampling Frame - Answer>>A list of individually named or
numbered sampling units
Simple Random Sample - Answer>>A sample where every
sampling unit has an equal chance of being chosen
Advantages of Simple Random Sample - Answer>>Free of bias
Easy and cheap to implement
Each sampling unit has equal chance of selection
Disadvantage of Simple Random Sample - Answer>>A
sampling frame is needed
Not suitable when the population size is very big
Systematic Sampling - Answer>>A method of sampling where
the required elements are chosen at regular intervals from an
ordered list
Advantages of Systematic Sampling - Answer>>Simple and
quick to use
Suitable for large samples
Disadvantages of Systematic Sampling - Answer>>A sampling
frame is needed
It can introduce bias if sampling frame is not random
Disadvantages of Stratified Sampling - Answer>>Sample
accuracy reflects the population structure
guarantees proportional representation of groups within a
population
Advantages of Stratified Sampling - Answer>>Population must
clearly classified into distinct strata
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