Question: To test whether the mean time to mix a batch of adhesive is the same for machines produced by four manufacturers, TiteBondMax obtained the data

To test whether the mean time to mix a batch of adhesive is the same for machines produced by four manufacturers, TiteBondMax obtained the data below on the time (minutes) to mix the materials. Test whether the machines have equal mean mixing time at alpha= 0.05

Maufacturer

A B C D

25 23 25 27

23 21 25 26

21 23 25 27

23 24 21 26

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