Lecture22 - STAT 350 Lecture 21 Chapter 3 Bivariate and...

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STAT 350 Lecture 21 Chapter 3 Bivariate and Multivariate Data and Distributions
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Announcement Homework #8 due Friday April 1 Lab 5 on Wednesday Lab 5 prep assignment due on Wednesday Lab 5 due on Saturday April 2 Office Hours (This Week Only) Wed 3:30 PM 4:30 PM Thur 3:30 AM 4:30 AM Normal Office Hours Next Week
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Topics Scatter Plots Correlation Fitting a Line to Bivariate Data
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Bivariate Data Example First thing we need is some sort of plot…
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3.1 Scatterplots 40 45 50 55 60 65 70 155 160 165 170 175 180
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Scatter plot Plots bi-variate data Plot the ( x,y ) pairs directly on plot Pattern within plot can indicate certain relationships between x and y Linear Quadratic, Cubic? Nonlinear? Exponential or Log?
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3.2 Pearson’s Correlation Coefficient The Pearson’s correlation coefficient measures the strength and direction of the linear relationship Examples: Father’s height and son’s height Age and Bone Density Weight and Blood Pressure
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Karl Pearson (1857 1936) Sir Francis Galton (1822 1911) Thinking about the degree to which children
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This note was uploaded on 02/06/2012 for the course STAT 350 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Lecture22 - STAT 350 Lecture 21 Chapter 3 Bivariate and...

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