PSY 1061 Study Guide - Midterm Guide: Standard Deviation, Interquartile Range, Quartile

• School: Temple University
• Department: Psychology
• Course: PSY 1061
• Professor: Jennifer Pacyon

Document Summary

This is most commonly used statistic, which provides a simple, single number that gives a rough summary of the distribution. Does not tell you how spread out the scores are (variance). Does not tell you how many scores are close to the mean. Median: means the value that lies in the middle after ranking all the scores. This measurement is useful when scores are skewed or when there are outliers (extreme scores). This is the least used measure because it provides the least amount of information of a given data. Negatively skewed: when most of the scores are clustered near the higher end of the distribution (tail is in the negative end). Positively skewed: when most of the scores are clustered near the lower end of the distribution (tail is in the positive end). Measures of variability: range: it compares the minimum score with the maximum score.