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
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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