AP+Statistics+Chapter+3+SEction+2

# AP+Statistics+Chapter+3+SEction+2 - AP Statistics Chapter 3...

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AP Statistics Chapter 3 Section 2

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Vocab x y One of the variables considered in the study One of the variables considered in the study n Represents the number of individuals involved in the study
Vocab i x Represents the data collected for each individual on the variable x i y Represents the data collected for each individual on the variable y

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Vocab x y x s The average of the data collected on variable x The average of the data collected on variable y y s The standard deviation of the data collected on the variable x The standard deviation of the data collected on the variable y
r - - - = y i x i s y y s x x n r 1 1 Summation Standardizing the variable x Standardizing the variable y Correlation Coefficient

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r Correlation Coefficient (r) A numerical description of the strength of the linear relationship between two quantitative variables.
Facts about r 1. +r: positive association, -r: negative association 2. -1< r < 1

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## This note was uploaded on 04/10/2011 for the course MATH 1070 taught by Professor Akbas during the Fall '08 term at Georgia State University, Atlanta.

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AP+Statistics+Chapter+3+SEction+2 - AP Statistics Chapter 3...

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