CMNS 260 Lecture Notes - Lecture 8: Empirical Relationship, Falsifiability, Null Hypothesis

• School: Simon Fraser University
• Department: Communication
• Course: CMNS 260
• Professor: Chris Jeschelnik

Document Summary

Average (means so many different things; not used in course much); Thi(cid:374) part is the dire(cid:272)tio(cid:374) (cid:455)ou(cid:859)re looki(cid:374)g at. Dispersion distribution of values around some central value. Mode average representing the most frequently observed value or attribute (one the occurs the most) Not quite normally distributed; more to the right (clumping on the higher side) Another type of graph: scattergram or scatter plot. Essentially the same thing as histogram but small dots on the graph. Helps to collapse everything down and make it easier to control. Only 10 cases which is manageable, anymore would be a little too much. Raw data is difficult to grasp, especially with large number of cases or records. Identify the lowest and highest values of the variable. Remember that class (category) intervals must be both mutually exclusive and exhaustive. Grouped data (in equal class intervals) for severity of injury.