SOAN 2120 Lecture Notes - Lecture 7: Standard Deviation, Histogram

• School: University of Guelph
• Department: Sociology and Anthropology
• Course: SOAN 2120
• Professor: D Walters

Document Summary

Statistics: taking out a portion of the numerical data (1, 5, 3, [6, 7, 9], 7) and studying how to make sense of the data. Statistical problem occurs when you do not know everything about a group of individuals (group you need info about) Population: group of individuals you"re gathering data from. Inference: conclusions drawn from a population (i infer that _) Relative frequency histogram: create classes, find out what units the classes contain, divide units into the classes, data is organized and represented in the graph. Class width: how wide classes are; if 1st class starts at 1 10 the class width is 10 units (divide range by # of classes you want) Class frequency: total number of measurements in each group. Class relative frequency: portion of total frequency that falls into a class, in relation to total number of measurements. Distribution curve: looks like a bell (draw a curved line over the boxes)