7. Consider the data with Analysis in the following computer output:

Level N Mean St Dev

A 5 10.700 2.462

B 5 16.800 2.168

C 5 10.800 2.387

Sources DF SS MS F P

Groups 2 122.03 61.02 11.11 0.002

Error 12 65.84 5.49

Total 14 187.87

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

Round your answer for pooled standard deviation to two decimal places

The pooled standard deviations is

Degrees of freedom =