PSYC 3000 Lecture Notes - Lecture 4: Box Plot, Standard Deviation, Analysis Of Variance

• School: Carleton University
• Department: Psychology
• Course: PSYC 3000
• Professor: Bruce Hutcheon

Document Summary

Can talk about the centre of the data using median and mode. All statistical tests are tests of the mean. S= sd standard deviation: a length, mark off how far we are from mean, like a ruler, q3-q1/s o. The median separates the lower 50% of observations from the upper 50% of observations. Top of median is q3 and bottom is q1. It"s always 50% on both sides of box in boxplot even if it"s bigger . data is just spread out. Or throw out outliers only when you see extreme outliers: do either or don"t throw away any but make sure you talk about what you did and describe it so they can replicate it. 50% of data points are inside the box. Boxplots summarize data and allow you to compare.