Ap Statistics Vocabulary

NEW AP STATISTICS VOCABULARY 1. AVAILABLE DATA-are data that were produced in the past for some other purpose but that may help answer a present question 2. OBERVATIONAL STUDY-we observe individuals and measure variables of interest but do not attempt to influence their responses 3. EXPERIMENT STUDY-we deliberately do something to individuals in order to observe their responses 4. INDIVIDUALS-are the objects described by a set of data. Individuals may be people, but they may also be animals or things. 5. VARIABLE-is any characteristic of an individual. A variable can take different values for different individuals. 6. CATEGORIACAL VARIABLE-places an individual into one of several groups or categories 7. QUANTITATIVE VARIABLE-takes numerical values for which arithmetic operations such as adding and averaging make sense 8. DISTRIBUTION- of a variable tells us what values the variable takes and how often it takes these values