PSYC37H3 Chapter Notes - Chapter 2: Takers, Percentile Rank, Percentile
Document Summary
Inferences: logical deductions about events that cannot be observed directly. Descriptive statistics: methods used to provide a concise description of a collection of quantitative information. Inferential statistics: methods used to make inferences from observations of a small group of people known as a sample to a larger group of individuals known as a population. A psychological test rarely has the property of equal intervals. For many psychological qualities, it is extremely difficult, if not impossible, to define an absolute 0 point. Types of scales: nominal scale: does not have the property of magnitude, equal intervals, or an absolute 0. Are really not scales at all; their only purpose is to name objects. Used when the information is qualitative rather than quantitative. E. g. , the numbers on the backs of football players" uniforms: ordinal scale: has the property of magnitude but not equal intervals, or an absolute 0.
