Consider the data with analysis shown in the following computer output: Level Me

Question

Consider the data with analysis shown in the following computer output: Level Mean StDev 4 10.700 2.990 5 16.800 2.168 6 10.800 2.387 Source DF SS MS Groups 2 150.52 75.26 10.74 0.002 12 84.07 7.01 Error 14 234.59 Total 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 Answer * 1: the tolerance is +/-2% Answer *2: exact number, no tolerance

Explanation / Answer

Answer:

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

Pooled standard deviation = sqrt(MS Error) = sqrt(7.01) = 2.648

The pooled standard deviation is: 2.648

Degrees of freedom: degree of freedom error = 12

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