# S2 Sampling terminology

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• Created by: Alex2017
• Created on: 23-04-17 11:21
Population
A collection of individual people or items
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Finite Population
Each individual can be given a number
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Infinite Population
Each individual cannot be given a number -there are too many
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Census
An investigation in which information is obtained from all members of a population
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Sample
A sub-set of the population
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Sampling Units
Individual units of a population
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Sampling Frame
A list of all sampling units
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Simple Random Sample
Every possible sample of a certain size has an equal chance of being selected
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Sample Survey
An investigation using a sample
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Bias
Anything which occurs when taking a sample which prevents it from being truly representative of the whole population
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Population Parameter
Any characteristic of a population which is measurable
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A statistic
A quantity calculated solely from the observations in a sample (it doesn't involve any unknown parameters)
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Sampling Distribution
Gives all the values of a statistic and the probability that each would happen by chance alone
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## Other cards in this set

### Card 2

#### Front

Each individual can be given a number

#### Back

Finite Population

### Card 3

#### Front

Each individual cannot be given a number -there are too many

### Card 4

#### Front

An investigation in which information is obtained from all members of a population

### Card 5

#### Front

A sub-set of the population