Psychology 2820E Lecture Notes - Lecture 8: Alternative Hypothesis, Narcissistic Personality Inventory, Beck Depression Inventory

• School: Western University
• Department: Psychology
• Course: Psychology 2820E
• Professor: Livia Veselka

Document Summary

Population: all units making up a group of interest, values representing a population: finite population: population that contains a limited, countable number of units. Students enrolled in psych 2820 in 2010: infinite population: no limit to the number of units that could potentially belong to population. Sample: a subset of units making up a group of interest, should be unbiased and representative, values representing a population are called statistics. Variable: any characteristic or feature of a population that researchers aim to study, must be measurable, must vary in the population. Quantitative variables: measured on a numerical scale: interval: defined by a numerical scale with an arbitrary zero point; scores cannot be compared as ratios. Temperature: ratio: defined by a numerical scale with a meaningful zero point; scores can be compared as ratios. Qualitative variables: measured using descriptive categories: nominal: information classified into distinct and descriptive categories; no logical order defining categories.