PSYC 1010 Study Guide - Midterm Guide: Square Root, Systematic Sampling, Normal Distribution

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1010
• Professor: David Stanley

Document Summary

Organize summarize and communicate numerical information: inferential statistics. Using data collected from a sample to draw conclusions about a population. Population: set of all observations in a particular study. Sample: a set of observations drawn from a population of interest for inclusion in a study. Can only take on specific values (integers) Observations with names or categories as values. Know rank but no info about size intervals: scale variables. Observations of ordered numerical values with intervals of equal size, no meaningful zero. Observations of ordered numerical values with intervals of equal size, but there is a meaningful zero. Can form ratios: set of procedures used to measure or manipulate a variable. Confounding variable: uncontrolled variable that it unintentionally allowed to vary systematically with the independent variable. Validity: extent that the test measures what it is supposed to measure. No manipulation, only observation: experimental method. Randomly assign participants to levels (groups) of the independent variable.