Question: Find a 95% confidence interval for the difference in the means of populations C and D. Refer to the data with analysis shown in the

Find a 95% confidence interval for the difference in the means of populations C and D.

Refer to the data with analysis shown in the following computer output:

Level N Mean StDev A 86.833 5.231 76.167 6.555 80.000 9.230 D 69.333 6.154 Source DF Groups SS MS 3 962.8 320.9 6.64 0.0

Level N Mean StDev A 86.833 5.231 76.167 6.555 80.000 9.230 D 69.333 6.154 Source DF Groups SS MS 3 962.8 320.9 6.64 0.003 Error 20 967.0 48.3 Total 23 1929.8

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