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 sternt correlation and inform its limitations. (d) What appends be needed to manoeuvre a correlation coefficient? (e) What atomic number 18 the deuce ways of block outing a correlation coefficient for qualified relation? A) Correlation analysis attempts to identify the kindred (if any) in the midst of two inconsistents of interest, while regression analysis uses one (or more) fissiparous 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 demonstrable or negative and the distance f rom 0 signifies the strength of the relationship. In particular, the relationship described in this way is a analogue relationship. C) This quick rule is specific to your class. If youll tell me the rule, Ill be blessed 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 excessively need the sum of comforting 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 in that location are more than fair(a) these two. For example, the quick rule that you mention! ed 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 integral of life value at ? = .05. (c) What is your final result about the slope?...If you indigence to get a full essay, order it on our website: BestEssayCheap.com

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