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chapter 12
statistics
9
Mathematics
Not Applicable
04/20/2009

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Term
Data
Definition
are measurments or observations that are gathered for an event under study
Term
Statistics
Definition
is the branch of mathematics that involves collecting, organizing, summarizing, and presenting data and drawing general conclusions from data
Term
Population
Definition
consists of all subjects under study
Term
Sample
Definition
is a representative subgroup or subset of the population
Term
Random sample
Definition
each suject of the population must have an equal chance of being selected
Term
Systematic sample
Definition
is taken by numbering each member of the population and then selecting every kth member, where k is a natural mumber
Term
Stratified sample
Definition
where the population is divided into groups where the members of each group have similar characteristics(such as female freshmen, male freshmen, female sophomores, and male sophomores)and members of each group are selected at random
Term
Cluster sample
Definition
when an intact group if subjects that represent the population is used for a sample
Term
Descriptive data
Definition
used to describe data
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