PSYC 210 Lecture Notes - Lecture 1: Horse Length, Percentile Rank, Pie Chart
Document Summary
Descriptive: descriptors, anything that can be measured and stated men and y women in a sample professors and y. Variables: labels applied to something that can differ (gender, age, etc) Statistics tend to describe variables or relationships among variables. A variable can be seen as a set of elements. Ex: sex includes two elements (male and female) Ex: number of children in a family (whole numbers) Measurement: orderly assignment of numbers to variables. Sometimes numbers mean something, sometimes they don"t. Nominal: naming (assigning meaning to each number) Ordinal: in order, ranking (intervals may be different) Interval: in order, but differences (scale points) are equal. Ratio: same as interval, but there is a true zero point. Add up things that go to the right of the sign. For continuous, define number of acceptable digits and decimals. Wider bell curve, more stretched out = more variability. Positively skewed: bell curve pulled in the positive, or right direction by outliers.
