# S2 definitions

• Created by: Cymbeline
• Created on: 21-06-14 07:43
Sample
Chosen Members of a population
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Sample survey
investigation using a sample
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Sampling unit
individual units of a population
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Sampling frame
a list of sampling units within a population
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Sampling distrubution
gives values of a statistic and the probability that each would happen by chance alone
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Statistic
an RV that is a function of the sample and has no unknown parameters
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Population
collection of individual people or items, maybe finite or infinite
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Population parameter
a measurable characteristic of a population
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Census
information obtained from an entire population
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Hypothesis testing
An experiment to examine the value of a population parameter proposed by comparing Ho with H1
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Critical region
set of values in a test statistic that leads us to reject the null hypothesis.
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Hypothesis
A statement concerning a population parameter
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Actual significance level
the probability of incorrectly rejecting Ho in a critical region
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## Other cards in this set

### Card 2

#### Front

investigation using a sample

Sample survey

### Card 3

#### Front

individual units of a population

### Card 4

#### Front

a list of sampling units within a population

### Card 5

#### Front

gives values of a statistic and the probability that each would happen by chance alone