PSY 207 Chapter Notes - Chapter 1: Statistical Inference, Statistic, Statistical Parameter

• School: University at Buffalo
• Department: Psychology
• Course: PSY 207
• Professor: Erica Goddard

Document Summary

Statistics - refers to a set of mathematical procedures for organizing, summarizing, and interpreting information. Statistic - a value usually a numerical value that describes a sample. A statistic is usually derived from measurements of the individuals in the sample. Population - the set of all the individuals of interest in a particular study. Variable - a characteristic or condition that changes or has different values for different individuals. Data set - a collection of measurements or observations. datum - a single measurement or observation and is commonly called a score or raw score. Parameter - a value usually a numerical value that describes a population. A parameter is usually derived from measurements of the individuals in the population. sampling error - the naturally occurring discrepancy, or error, that exists between a sample statistic and the corresponding population parameter. Note that an operational definition has two components: first, it describes a set of operations for measuring a construct.