# Statistics keywords

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• Created by: SteffyJ28
• Created on: 20-09-15 19:55
Statistics
Using information to answer questions. This information is observed, collected, ordered, represented and analysed.
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Hypothesis
An assumption that is the starting point of an investigation. It may or may not be true.
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Quantitative variables
Numerical observations or measurements.
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Qualitative variables
Non-numerical observations.
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Continuous data
Can be any value from a continuous numerical scale.
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Discontinuous data
Can only be particular values from a continuous numerical scale.
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Ranked data
Values that can be put in order. This data can be counted and ordered but not measured.
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Categorical
Set of data values that can be sorted into categories.
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Data accuracy
Any measurement that is accurate to +-1/2 unit.
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Bivariate data
Pairs of related values.
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Population
Everything and everyone involved in an investigation.
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Census
Data containing information about every member of the population.
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Sample
Information about a part of the population.
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Sampling units
Are the people or items that are to be sampled.
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Sampling frame
The list of the people or items that are to be sampled.
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Random sample
Chosen without a conscious decision about which items from the population will be selected.
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Cluster sample
Used when a population naturally divides itself into clusters and samples are taken from each cluster.
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Quota sampling
Instructions are given about the quota to be sampled from each section of the population.
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Systematic sampling
Choose a starting point on a sampling frame and select items at regular intervals.
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Primary data
Data collected by the person using it.
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Secondary data
Data collected by someone else.
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Survey
Selection of data from a given population to analyse a certain issue.
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Pilot survey
A collection of data from a small sample used to test design and methods.
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Questionnaires
Set questions used to collect data.
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Open quetions
Questions with no suggested answers.
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Closed questions
Questions with suggested answers.
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## Other cards in this set

### Card 2

#### Front

An assumption that is the starting point of an investigation. It may or may not be true.

Hypothesis

### Card 3

#### Front

Numerical observations or measurements.

### Card 4

#### Front

Non-numerical observations.

### Card 5

#### Front

Can be any value from a continuous numerical scale.

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