PSYC 2260 Study Guide - Comprehensive Final Exam Guide - Normal Distribution, Variance, Null Hypothesis
20 Nov 2018
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2 branches of statistics: descriptive: to summarize and describe order, pattern, or structure in a group of number. Inferential: drawing conclusion based on the numbers but used to infer beyond the number. Number represent discrete qualitative categories (1= female; 2=male: numeric (quantitative) Rank-order (ordinal): 1=strongly disagree 5=strongly agree; place finished in a race. Equal-interval: number represents equal amounts of what is being measured. Ratio scale: an equal-interval variable; has an absolute zero point. Discrete variable: variable that has specific values and that cannot have values between these specific values. Continuous variables: underling continuity when an infinite number of possible value exists between any 2 measured value: E. g. self-esteem 1 2 3 4 5 ; you can have 1. 1, 1. 2, 1. 3 . True scales(ratio scale) are not used that much in psychology, most psychological variables are in nominal; rank-ordered, equal-interval. Note: a variable can have several different characteristics. Age: is continuous, equal-interval, and a ratio scale.
