PSYC 2020 Lecture Notes - Lecture 2: Statistic, Sampling Error, Statistical Parameter

• School: York University
• Department: Psychology
• Course: PSYC 2020
• Professor: Alistair Mapp

Document Summary

Set of mathematical procedures for organizing, summarizing, and interpreting information. Variables - something that is different from one person to another. Parameter - a value, usually numeric, that describes a population (e. g. , the average iq score of all students at canadian universities) A single number describing the entire population i. e the average iq. Problem: we are interested in the parameter that we cannot get - time and money. Go measure the iq from every student in a canadian uni stats course. Descriptive stats - procedures used to summarize, organize and simplify data. Inferential stats - techniques that allow us to make general statements about populations based upon data obtained from samples. Sampling error - error that exists between a sample statistic and its corresponding population parameter. We have a parameter, but we can"t measure that directly, so we sample, we get a subset.