STATS 7 Lecture Notes - Lecture 6: Dependent And Independent Variables, Random Assignment, Statistical Unit
Document Summary
Chapter 6: gathering useful data for examining relationships. Researchers or question participants about opinions, behaviors, or outcomes. Researchers do not assign any treatments or conditions. Researchers manipulate something and measure the effect of the manipulation on some outcome of interest. Participants are randomly assigned to participate in one condition (called treatment) or another. Sometimes cannot conduct experiment due to experiment due to practical/ethical issues. A single individual or object being measured. When units are people, often called subjects or participants. If an experiment, then called an experimental unit. Is one that may explain or may cause differences in a response variable. Confounding variable (cofounder) is a variable that both: May or may not be measured in the study. The effect of a confounding variable on the response variable cannot be separated from the effect of the explanatory variable. Often allow us to determine cause and. To make the groups approximately equal in all respects except for the explanatory variable (treatment)
