Answer Happy

210 Statistics EXTRA CREDIT Correlation and Regression Formulas Written Assignment 1. Follow the instructions below to calculate the correlation coefficient and least-squares regression line for the data set below. X y 2xZy メー女 2x = Sy y-y = Sy 1 7 3 S 4 4.5 4 4.5 5 4.5 7 4.5 The sample means and sample standard deviations for the two variables are listed below: S = 2 3-5 Sy=1 The linear correlation coefficient is Calculate this correlation coefficient using the steps 1 below. (a) First, complete the columns of the table above labeled = and These are the Sample standard scores.) (b) to complete the last column of the table, multiply each , by the corresponding. Then add the values in this column to get 52.2 fd Finally, divide the result of part (b) by n-1=6-1 = 5 to find the linear correlation coefficient, 2. Now calculate the slope and y-intercept of the least-squares regression line, and write the equation of this line how your calculations to earn the extra points) a) The slopes by=r. (b) The interceptis byy-bix= 14 Write the nation at the regression line 9=hex+bo