Correlation, Regression - α vs. p Alpha is the cut off...

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-what does it mean if a coefficient is significant? -regression: predicting something from someone - use one to predict the variation in another -variation: how spread out the scores are -predicting how spread out a score is by looking at how spread out the other is SS total = SS predicted + SS error -of y (criterion) σ 2 total = σ 2 predicted + σ 2 error -“expect a positive correlation” – there is a tendency -above average on one, probably above average on the other (covariance) - how to tell which variable is a better predictor
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Unformatted text preview: α vs. p Alpha is the cut off determined for p (.05= take a 5% of being wrong) P value is based on the number calculated Choose the smallest p value – least likely to be wrong-coefficient will be closer to +1 or -1-closest to correlation line-eliminated most error-compare actual to predicted (tests if the prediction is good)-which one is closer? – less error- SS predicted : how spread out the scores would be based on the regression line...
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This note was uploaded on 10/04/2011 for the course PSYC 3990 taught by Professor Vandellen during the Spring '10 term at University of Georgia Athens.

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