Sample proportion

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A part of a sample with a particular attribute, expressed as a fraction, decimal or percentage of the whole sample.

A common symbol for the sample proportion is p.

Example

Suppose the attribute of interest was left-handedness and that a random sample of 10 people contained 3 left-handed people.

The sample proportion is 3/10 or 0.3 or 30%.

See: proportion

Curriculum achievement objectives references
Statistical investigation: Levels (6), (7), 8