Res/342 Wk5

hebdomad 5 E-Text Exercise Chapter 12, 13, 14 RES/342 February 08, 2011 Week 5 E-Text Exercise Chapter 12, 13, 14 Week 5 Chapter 12, 13, 14 1. (a) How does correlation analysis disaccord from regression analysis? (b) What does a correlation coefficient reveal? (c) assure the nimble rule for a signifi trickt correlation and inform its limitations. (d) What integralitys be needed to foreshadow a correlation coefficient? (e) What atomic number 18 the daemon ways of block outing a correlation coefficient for conditional relation? A) Correlation analysis attempts to identify the kindred (if any) amid two covariants of interest, while regression analysis uses one (or more) commutative variable (the xs) to predict the value of another dependent (y) variable by means of a predictive model. B) The correlation coefficient can allot values between -1 and 1. The sign signifies whether the relationship is corroborative or negative and the distance from 0 signi fies the strength of the relationship. In particular, the relationship described in this way is a additive relationship. C) This quick rule is specific to your class. If youll tell me the rule, Ill be contented to cede you its limitations. D) You need the sum of the (xy). You need the sum of (x), the sum of (y). These are for calculating x-bar, y-bar. You in like manner need the sum of replete(p)-strength xs and ys. E) in that respect is a t-test. The test statistic is r/(sqrt((1-r^2)/(N-2)) there is also a z-test. The formula is Z = ln[|(r+1)/r-1)|]/2 on that point are more than fair(a) these two. For example, the quick rule that you mentioned above. There is also an F-test, I believe. You should meditate your notes to see which ones are being referred to here. 12.48 In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonalds employees. (a) Write the fitted regression equation. (b) State the degrees of independence for a twot ailed test for zero slope, and use Appendix ! D to find the full of life value at ? = .05. (c) What is your remnant about the slope?...If you indigence to get a full essay, order it on our website: BestEssayCheap.com

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