Descriptive and Inferential Statistics: Understanding Variability and Measurement Scales, Exams of Psychology

Download Descriptive and Inferential Statistics: Understanding Variability and Measurement Scales and more Exams Psychology in PDF only on Docsity! Psych Stats midterm descriptive statistics - used to summarize and describe a set f data in a clear and convenient fashion (GPA) inferential statistics - cant measure everyone used to draw inferences about a large population based on sample sample - subset of scores from population measure relatively small group of people populations - collection of measurements that share a common characteristics Variability - people differ from one another the extent to which scores in a group differ from one another, how spread out or scattered they are reasons for variability in research - individual differences unsystematic differences in procedure your manipulation Measurement scales - category ordinal property equal intervals absolute zero property category - assigned different number representing category ordinal property - can be used to measure those with least amount to most amount equal intervals - 1 unit difference remains constant absolute zero property - 0 is absence of something (ruler) types of scales - nominal ordinal interval ratio nominal - categories (gender) qualitative but not quantitative differences ordinal - ranks (class ranks) interval -