Consider the following data: n Group 1 31 68.5 191.3 Group 2 31 65.2 256.6 Assume that population variances between the two groups are identical. Which of the following is true if you wanted to test whether the population means between Group 1 and Group 2 are different? Ot= 68.5-65.2 [(30) (191.3)+(30)(256.6)]( 30 + 30) O t = 68.5-65.2 [(30) (191.3)+(30)(256.6)]( 30 + 30 ) 13437 O F = 60 168.79 168.79 O F = 13437 60