Res/342 Wk5

calendar week 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 good dealt correlation and inform its limitations. (d) What philias be needed to head a correlation coefficient? (e) What atomic number 18 the heller ways of block outing a correlation coefficient for qualified relation? A) Correlation analysis attempts to identify the kindred (if any) amongst two unsettleds of interest, while regression analysis uses one (or more) autarkic 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 confident(p) or negative and the distance from 0 signifie s the strength of the relationship. In particular, the relationship described in this way is a linear relationship. C) This quick rule is specific to your class. If youll tell me the rule, Ill be ingenious 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 withal need the sum of square 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 at that place are more than fair(a) these two. For example, the quick rule that y ou 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 twotailed test for zero slope, and use Appendix D to find the undecomposed of life value at ? = .05. (c) What is your coating about the slope?...If you indigence to get a full essay, order it on our website: OrderCustomPaper.com

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