Sampling and Data Collection (AQA GCSE Maths): Flashcards
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Sampling
Sampling
Studying smaller groups to learn about larger groups
Population (in sampling)
Population (in sampling)
Complete group you want to investigate
Sample (in sampling)
Sample (in sampling)
Smaller group selected from population that you study
Requirements for representative sample
Requirements for representative sample
Random (equal chance) and large enough
Biased sample
Biased sample
Sample that doesn't properly represent the whole population
Primary data
Primary data
Information you collect yourself
Secondary data
Secondary data
Information someone else has already collected
Qualitative data
Qualitative data
Descriptive data using words rather than numbers
Quantitative data
Quantitative data
Data that measures quantities using numbers
Discrete vs continuous data
Discrete vs continuous data
Discrete: exact values only; Continuous: any value in range