CMN 3102 Lecture Notes - Lecture 4: Descriptive Statistics, Statistical Inference, Central Tendency

• School: University of Ottawa
• Department: Communication
• Course: CMN 3102
• Professor: Elizabeth Dubois

Document Summary

Cmn3102 - descriptive statistics and measurement - 25/01/20. Important: statistics main use for communication research is to describe, organize and interpret information. Descriptive vs inferential statistics: descriptive describes the date while inferential statistics are used to make predictions using a sample of the population. Measures of central tendency: how to analyse the data of a group. The mean or average: represents all the scores of a group. The median: the middle of a list of data. The mode: the value that is the most frequent. Frequency distributions: a chart that summarizes and organizes a set of data. Example: statistics (wrench, 2008) biological sex. The range: how far apart scores are. The sum of square: information about both the amount and the origins of individual differences (thompson, 2006) The variance: how wide a distribution is. Standard deviation: the square root of the variance. Measurements: the process of systematic observation and assignment of numbers to phenomena according to rules.