The following table gives the 2015 total payroll (in millions of dollars) and the percentage of games won during the 2015 season by each of the National League baseball teams.

a. Find the standard deviation of errors, σ_ε with percentage of games won as the dependent variable. (Note that this data set belongs to a population.)
b. Compute the coefficient of determination, ????².

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Total Payroll Percentage of Team (millions of dollars) Games Won Arizona Diamondbacks 92 49 Atlanta Braves 98 41 Chicago Cubs 119 60 Cincinnati Reds 117 40 Colorado Rockies 102 42 273 Los Angeles Dodgers 57 Miami Marlins 68 44 42 Milwaukee Brewers 105 New York Mets 101 56 Philadelphia Phillies 136 39 88 Pittsburgh Pirates 61 San Diego Padres 101 46 173 San Francisco Giants 52 St. Louis Cardinals 121 62 Washington Nationals 165 51