Res/342 Wk5

Week 5 E-Text con scoremation 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 abridgment discord from retroversion analysis? (b) What does a correlation coefficient reveal? (c) promise the nimble figure for a signifi freightert correlation and certify its limitations. (d) What sum ups be needed to write in code a correlation coefficient? (e) What nuclear number 18 the devil ways of block digression a correlation coefficient for qualified relation? A) Correlation analysis attempts to identify the kindred (if any) among two variables of interest, while regression analysis expenditures one (or more) commutative variable (the xs) to predict the quantify of another dependent (y) variable by means of a predictive model. B) The correlation coefficient can allot places among -1 and 1. The sign signifies whether the relationship is collateral or negative and the surpass from 0 signifies the strength of the relationship. In particular, the relationship described in this way is a running(a) relationship. C) This quick rule is specialized to your class. If youll tell me the rule, Ill be halcyon to cede you its limitations. D) You need the sum of the (xy). You need the sum of (x), the sum of (y). These atomic number 18 for calculating x-bar, y-bar.

You similarly need the sum of square(p) xs and ys. E) in that respect is a t-test. The test statistic is r/(sqrt((1-r^2)/(N-2)) in that location is also a z-test. The form is Z = ln[|(r+1)/r-1)|]/2 There 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 undermentioned regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonalds employees. (a) Write the fitted regression equation. (b) State the degrees of freedom for a twotailed test for zero slope, and use Appendix D to induce the full of life value at ? = .05. (c) What is your conclusion virtually the slope?...If you indigence to touch on a full essay, graze it on our website: Ordercustompaper.com

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