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Statistics

Maths

TermDefinition
Primary data Is data collected by an individual or organisation for their own use
Secondary data this is already available or has been collected by somebody else for a different purpose
Ordinal categorical data Can be ordered in some way
Nominal categorical data Cannot be ordered
The population is the entire group that is being studied
A sample is a group that is selected from the population
A questionnaire is a set of questions designed to obtain data from the population
A stem and leaf plot represents numerical data by seperating each piece of data into two parts: the stem and the leaf
The mode a set values is the value that occurs most often
The median of a data set is the middle value after the data has been ranked
An outlier is an observation that lies an abnormal distance from other values in a data set
Created by: Sarah C. Lynch
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