Regression. A coach wants to see the relationship between the statistics of practice games and official games of a local soccer team. A sample of 23 players was used and the resulting (partial) Excel output is shown below. Assume both x and y form normal distributions. Regression Statistics Multiple R R Square 0.70524 Adjusted R Square 0.668395 Standard Error 8.703633 Observations 23 Coefficients Standard t Stat P-value Lower Upper (a) The slope of the regression line is O A. 40.046 O B. 0.753 O C. 4.374 O D. 0.178 (b) The correlation coefficient is O A. -0.8398 O B. None of the other answers O C. 0.705 O D. 0.8398(e) The degrees of freedom are: O A. 21 O B. 22 O C. 23 O D. 20 (f) At the 5% significance level it can be concluded that there is evidence to suggest the correlation coefficient is O A. not zero O B. negative O C. zero O D. positive