Consider the data with analysis shown in the following computer outputs Level N Mean StDev A 6 10.100 2.942 B 5 16.800 2.168 4 10.800 2.387 Source MS Groups 2 138.60 69.30 10.50 0.002 Error 12 79.17 6.60 Tota 14 217 77 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 degrees of freedom =