Week 10 - Chapter 12a.docx - Week 10 – Chapter 12a What is correlation and when is it used o X is independent o o o Y is dependent Measures strength

Week 10 - Chapter 12a.docx - Week 10 – Chapter 12a What...

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Week 10 – Chapter 12a What is correlation and when is it used o X is independent o Y is dependent o Measures strength and direction of linear relationship between two variables o Coefficient of correlation r = ( x −´ x ) ( y − ´ y ) ( x −´ x ) 2 ( y −´ y ) 2 ranges ¿ 1 ¿ 1 o Correlation Statistical measure Does not imply change in one variable cause of change in other variable o Causation Indicates one event is the result of the occurrence of other Casual relationship between the two Cause and effect
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An understanding of simple regression and its uses (key aspect of machine learning) Test hypotheses and interpret the results about the slope of the regression model Estimate values using regression model o Develop a linear trend line and use it to make forecast. o Compute the simple regression line from a and interpret the slope and intercept of the equation o Simple regression analysis
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  • Fall '14
  • IgnacioCastillo

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