CMN 3102 Lecture Notes - Lecture 6: Descriptive Statistics, Central Tendency, Frequency Distribution

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

Document Summary

Mean: average, add up all the numbers then divide by the number of numbers. Medium: line up all the numbers from smallest to largest and choice the one in the middle. Mode: the number that occurs most frequently (there may be more than one) Statistic: when we calculate information from a sample. Ex. proportion of negative tweets vs positive tweets. Interpret: to infer some sort of larger claim. Descriptive statistics: used to describe what exists in the data. Makes a lot of data manageable: and more useful for making conclusions! Mean: average, represent entire group of scores (not great with outliers because it throws everything off and makes it less useful) When you have big outliers, use median! You want to calculate all 3 and see how they differ (ex. You should expect that they are all very similar, if they"re not it implies that. Something unexpected is going is going on: this is the social scientific.