What is the pooled standard deviation? What degree of freedom are used in doing inferences for these means and differences in means?

Question 7 of 17 - 12 Consider the data with analysis shown in the following computer output: Level N Mean StDev A 6 10.200 2.695 B 5 16.800 2.168 C 4 10.800 2.387 Source OF SS MS F P Groups 2 135.72 67.86 11.27 0.002 Error 12 72.21 6.02 Total 14 207.93 e here to search W O 79% 56 OF 199+ L