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GCSE Statistics · key term
An approximate value for an unknown population characteristic, obtained using available data.
Used by Edexcel
Specification 2h.01 · Paper 1, Paper 2
Revise: Estimating population characteristicsMeasuring every member of a population can be expensive or time-consuming. Instead, we can collect data from a sample and use its summary statistics to estimate characteristics of the whole population.
Use the sample mean to estimate the population mean, not the sample total.
Describe population predictions as estimates. A larger representative sample generally improves reliability, but increasing size alone does not remove bias.
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