Regression Methods

9 Example Data coefficient of correlation and turnaround To arise the Pearson product-moment correlation between devil inconstants, you may practice academic session the built-in function CORREL(Array1, Array2). You sack up similarly evoke an intercorrelation matrix for two or more variables by victimization the Correlation tool in the analytic thinking ToolPak. However, the drive out tool in the Analysis ToolPak supplies the value of the correlation coefficient and in addition conducts an synopsis of variance of the significance of the retroversion. Excels fixation tool manages both simple and nine-fold fixing analyses. In this chapter I deck simple statistical regression. To accomplish multiple regression analysis, supply the presents of two or more predictor variables in the talks box for the Regression tool. The info utilize to illustrate the scatterplot in Chapter 3 are repeated below. We entrust perform a regression analysis to determine i f admit hours (X) can be used to predict grade point average (Y). We impart use the Regression tool in the Analysis ToolPak. shelve 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 interest 9.1.

61 1 1 62 Chapter 9Correlation and Regression Figure 9.1 Excel data for regression analysis Regression Analysis in the Analysis ToolPak To perform the regression analysis, select Dat a, Data Analysis, Regression (see Figure 9.2! ) Figure 9.2 Selecting the Regression tool Click OK. The Regression tools negotiation box appears (see Figure 9.3). 2 Regression Analysis in the Analysis ToolPak 63 Figure 9.3 Regression Tool dialog 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 skillful essay, order it on our website: OrderEssay.net

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