Your coworker has computed the explained and the total variation in Y and asked you to compute the coefficient of determination Expl.var.in $Y = \sum _ { t = 1 } ^ { n } \left( \hat { Y } _ { t } - \bar { Y } \right) ^ { 2 } = 550$
Total. var.in $Y = \sum _ { t = 1 } ^ { n } \left( Y _ { t } - \bar { Y } \right) ^ { 2 } = 895$

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The Answer of Your coworker has computed the explained and the total variation in Y and asked you to compute the coefficient of determination Expl.var.in $Y = \sum _ { t = 1 } ^ { n } \left( \hat { Y } _ { t } - \bar { Y } \right) ^ { 2 } = 550$
Total. var.in $Y = \sum _ { t = 1 } ^ { n } \left( Y _ { t } - \bar { Y } \right) ^ { 2 } = 895$

Your Coworker Has Computed the Explained and the Total Variation Y=∑t=1n(Y^t−Yˉ)2=550Y = \sum _ { t = 1 } ^ { n } \left( \hat { Y } _ { t } - \bar { Y } \right) ^ { 2 } = 550Y=∑t=1n​(Y^t​−Yˉ)2=550

Your Coworker Has Computed the Explained and the Total Variation $Y = \sum _ { t = 1 } ^ { n } \left( \hat { Y } _ { t } - \bar { Y } \right) ^ { 2 } = 550$