Consider the data with analysis shown in the following computer output: Level N Mean StDev A 5 10.000 3.135 B 5 16.800 2.168 C 5 10.800 2.387 Source DF SS MS F P Groups 2 138.13 69.07 10.25 0.003 Error 12 80.90 6.74 Total 14 219.03 What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in O means? Round your answer for the pooled standard deviation to two decimal places. The pooled standard deviation is degrees of freedom =