Regression Methods

9 Example Data coefficient of correlation and turnaround To name the Pearson product-moment correlation between devil unsettleds, you may practice session the built-in function CORREL(Array1, Array2). You sack up similarly evoke an intercorrelation matrix for two or more variables by employ the Correlation tool in the analytic thinking ToolPak. However, the reelect tool in the Analysis ToolPak supplies the value of the correlation coefficient and in addition conducts an abbreviation of variance of the significance of the retroversion. Excels retroflexion tool manages both simple and sixfold fixing analyses. In this chapter I deck simple reverting. To accomplish multiple regression analysis, supply the presents of two or more predictor variables in the talks box for the Regression tool. The selective information utilise to illustrate the scatterplot in Chapter 3 are repeated below. We go out perform a regression analysis to determine if take on hours (X) can be used to predict grade point average (Y). We ordain use the Regression tool in the Analysis ToolPak. tabularise 9.1 consume hours and GPA Student 1 2 3 4 5 6 7 8 9 10 Hours 10 12 10 15 14 12 13 15 16 14 GPA 3.33 2.92 2.56 3.08 3.57 3.31 3.45 3.93 3.82 3.70 Student 11 12 13 14 15 16 17 18 19 20 Hours 13 12 11 10 13 13 14 18 17 14 GPA 3.26 3.00 2.74 2.85 3.33 3.29 3.58 3.85 4.00 3.50 Place the data in an Excel workbook as shown in take condole with 9.1.

61 1 1 62 Chapter 9Correlation and Regression Figure 9.1 Excel data for regression analysis Regression Analysis in the Analysis ToolPa k To perform the regression analysis, selec! t Data, Data Analysis, Regression (see Figure 9.2) Figure 9.2 Selecting the Regression tool Click OK. The Regression tools duologue box appears (see Figure 9.3). 2 Regression Analysis in the Analysis ToolPak 63 Figure 9.3 Regression Tool talks box take down the range for the Y variable (GPA) including the column heading. You can drag done the range or type in the cell references. Enter the range for the X variable in the same...If you want to cohere a rich essay, order it on our website: BestEssayCheap.com

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