Unit 1 Vocab - Sampling Bias When a sampling method...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Sampling Bias- When a sampling method regularly under represents some segment of the population and over represents others. Observational Study- researchers record data from subjects without interfering in subjects' actions or choices conclusions about cause-and-effect should not be drawn Explanatory Variable- the variable in a study whose values might explain a pattern in values of another variable Response Variable- the variable in a study whose values might be determined by values of another variable Lurking Variable- a variable that might be related to the other important variables in a study, but is not addressed by the study Confounding Variable- a variable that has values which cannot be separated from the other variables in a study making it impossible to attribute any observed tendency to values of any one particular variable Placebo- a harmless treatment given to patients in the control group so they are not aware that they are not being treated Random Assignment- using a process such as a coin flip to decide whether a patient enters the control group or the treatment group...
View Full Document

This note was uploaded on 05/23/2010 for the course MATH 153 taught by Professor Garant during the Spring '10 term at Prairie State College .

Ask a homework question - tutors are online