Chapter 8, Section 2, Exercise 046 Consider the data with analysis shown in the following computer output: Level N Mean StDev A 5 87.014 4.908 B 5 76.167 6.555 C 7 80.000 9.230

Chapter 8, Section 2, Exercise 046

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

Level N Mean StDev

A 5 87.014 4.908

B 5 76.167 6.555

C 7 80.000 9.230

D 7 69.333 6.154

Source DF SS MS F P

Groups 3 980.04 326.68 6.49 0.003

Error 20 1006.61 50.33

Total 23 1986.65

Is there sufficient evidence of a difference in the population means of the four groups?

Yes

No

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