SSH 301 Lecture Notes - Lecture 3: Interquartile Range, Central Tendency, Descriptive Statistics
15 Jul 2016
School
Department
Course
Professor
Document Summary
Two additional kinds of statistics are almost always useful: measures of central tendency. Some idea of the typical or average case in the distribution. E. g. the average starting salary for social workers is ,000 per year: measures of dispersion. Some idea of how much variety or heterogeneity there is in the distribution. In this province, starting salaries for social workers range from ,000 per year to ,000 per year) Three commonly used measures of central tendency: mode. The average of the scores of the cases. Interval-ratio level variables othese reduce huge arrays of data to a single understood number. ocentral purpose of descriptive statistics is to summarize or reduce data. Measures of central tendency and measures of dispersion must be paired for a full description of a distribution of scores. Each of the measures of dispersion variation ratio, range, interquartile range, variance, and standard deviation, will increase in value as distributions become flatter.
