Populations (Edexcel GCSE Statistics): Flashcards
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10 cards from this deck
What is a census?
What is a census?
Collecting data from every member of the population.
What is a sample?
What is a sample?
Data gathered from some members of the population.
Why is a sample considered quicker than a census?
Why is a sample considered quicker than a census?
It gathers data from fewer members, saving time.
What is a sampling frame?
What is a sampling frame?
A complete list of population members to choose from.
Why are pilot surveys used?
Why are pilot surveys used?
To test data collection methods on a small scale.
What makes a sample biased?
What makes a sample biased?
Favoring certain groups or characteristics unfairly.
Name a problem with a small sample size.
Name a problem with a small sample size.
It may not accurately reflect the whole population.
In the leisure centre case, who is the sampling unit?
In the leisure centre case, who is the sampling unit?
One person who uses the leisure centre.
What should you be cautious about when defining a population?
What should you be cautious about when defining a population?
Make sure it matches the investigation's purpose exactly.
What is the main advantage of a census?
What is the main advantage of a census?
It gives complete information about the population.