204 1.2%2c1.3 sampling

# 204 1.2%2c1.3 sampling - 1.1 Introduction Statistics The...

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1.1 Introduction Statistics The collection, organization, summarization, and analysis of information The Two Branches of Statistics - 1) Descriptive Statistics _______________________________________________________ _______________________________________________________ 2) Inferential Statistics _______________________________________________________ _______________________________________________________ Types of Data - 1) Qualitative _________________________________________ _______________________________________________________ _______________________________________________________ 2) Quantitative ________________________________________ _______________________________________________________ _______________________________________________________ a) Continuous _______________________________________ ____________________________________________________ b) Discrete ________________________________________ 1.2 Types of Studies and Simple Random Sampling Explanatory variables - the cause variables Response variables – the effect variables Their values are determined by the explanatory variables Types of studies : 1)Observational _______________________________________ _________________________________________________________ 2) Experimental _______________________________________ _________________________________________________________

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Confounding - Confounding occurs when the effects of two variables on a response variable are not distinguished from each other. Lurking variables A lurking variable is a variable which is not one of the explanatory or response variables and yet it affects the response variable (confounding) Example -
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## This note was uploaded on 12/05/2011 for the course MATH 2040 taught by Professor Raysievers during the Fall '10 term at Utah Valley University.

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204 1.2%2c1.3 sampling - 1.1 Introduction Statistics The...

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