# ch. 1 stats

 The flashcards below were created by user mmb65 on FreezingBlue Flashcards. Statistics a set of mathematical procedures for organizing, summarizing, and interpreting information population the set of all individuals of interest in a particular study sample set of individuals selected from a population, usually intended to represent the population in a research study variable characteristic or condition that changes or has different values for different individuals Data measurement or observations data set a collection of measurements or observations datum a single measurement or observation parameter a value that describes at population statistic a value that describes a sample descriptive statistics statistical procedures used to summarize, organize, and simplify data inferential statistics consitsts of techniques that allow us to study samples and then make generalizations about the populations sampling error the amount of error that exists between a sample statistic and the corresponding population parameter correlational method two different variables are observed to determine whether there is a relationship between them experimental method one variable is manipulated what another variable is observed and measured independent variable variable manipulated by the researcher dependent variable variable being observed control condition do not receive the experimental treatment experimental condition receive the experimental treatment constructs internal attributes or characteristics that cannot be directly observed but are useful for describing and explaining behavior operational definition identifies a measurement procedure for measuring an external behavior and uses the resulting measurement of a hypothetical construct discrete variable consists of separate, indivisible categories continuous variable infinite number of possible values that fall between any two observed values real limits are boundaries of the intervals for scores that are represented on a continuous number line upper real limit top interval lower real limit bottom interval nominal scale consists of a set of categories that have different names (labels and categorized observations) ordinal scale consists of a set of categories that are organized in an ordered sequence interval sale consists of ordered categories that are all intervals of exactly the same size ratio scale is an interval scale with the additional feature of an absolute zero point Authormmb65 ID33812 Card Setch. 1 stats DescriptionDefinitions from chapter 1 Updated2010-09-10T14:17:10Z Show Answers