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Chapter 2
What Are Data?
10
Mathematics
11th Grade
11/15/2011

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Term
Unit
Definition
A quantity or amount adopted as a standard of measurement, such as dollars, hours, or grams.
Term
Case
Definition
Is an individual about whom or which we have data.
Term
Data Table
Definition
An arrangement of data in which each row represents a case and each column represents a variable.
Term
Variable
Definition
Holds information about the same characteristic for many cases.
Term
Data
Definition
Systematically recorded information, whether numbers or labels, together with its context.
Term
Population
Definition
All the cases we wish we knew about
Term
Context
Definition
Tells Who was measured, How the data were collected, Where the data were collected, and When & Why the study was performed
Term
Categorical variable
Definition
A variable that names categories (whether with words or numerical)
Term
Quantitative variable
Definition
A variable in which the numbers act as numerical values. These always have units.
Term
Sample
Definition
The cases we actually examine in seeking to understand the much larger population.
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