PSY 1101 Lecture Notes - Lecture 1: Null Hypothesis, Explained Variation, Falsifiability

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Kenneth Campbell

Document Summary

Image: hotel in amsterdam just for philosophers sandton hotel de filosoof. There are usually (almost always) individual differences in the dependant measure. The mode is the score that occurs most often. The mean is the average of all the scores. The median is the score at which half the individuals score above and half score below. At times our measures are not normally distributed. Extremely high (or low) scores might distort the average (or mean) In this case, the median might be a better measure of central tendency. Fact: on average, women have lower salaries than men. A change in one variable is also associated with a change in another. Ex: geese & leaves; smoking & cancer; testosterone & violence; heroin & marijuana. Note: this does not mean that change in one variable causes the other variable to change. Correlation- a statistical measure of the extent of a relationship between two variables.