Current Attempt in Progress Consider the data with analysis shown in the fol lowing computer output: Level N Mean StDev A 5 10.400 2.736 B 5 16.300 2.168 C 5 10.300 2.38? Source DF 53 MS F P Groups 2 128.53 64.27 10.78 0.002 Error 12 71.53 5.96 Total 3.4 200.06 What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means? Round your answer for the pooled standard deviation to two decimal places. The pooled standard deviation is I: . degrees of freedom = n