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Chapter 14

summary for chapter 14

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Brent Berry

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Chapter 14 The key element of statistical imagination is the analysis if cause and consequences with the goal to predicting future events The test estimate of a dependent variable can be imposed if we can identify independent variable and extend the analysis to the bivariate level Correlation: is a systematic change in the scores of 2 interval ration variable (when the change in one variable change in tandem with the measurement of the other) 2 variable correlated if their measurement consistently change together form case to case Simple bivariate linear correlation and regression analysis 1) Procedure of improving best estimate of Y by accounting for its relationship with X (main goal to reduce error in prediction) 2) Central idea: use a straight line to improve best estimate of an interval ratio (y) for all values of interval ration (x) 3) The formula to estimate Y Y= a+bX (
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