1.1 Variables and Data
Definition: A is a characteristic that changes or varies over time and/or different individuals or objects under consideration.
Examples: Weight, stock prices, height, price of gasoline
Definition: An is the individual or object on which a variable is measured.
A single or data value results when a variable is actually measured on an experimental unit, e.g., the price of gas of a particular type at a particular station on a particular day, the price of a particular stock issue on a particular day at closing.
Definition: A is the set of all measurements of interest to the investigator.
©1998 Brooks/Cole Publishing/ITP