To test whether the mean time to mix a batch of adhesive is the same for machines produced

by four manufacturers, TiteBondMax obtained DATA on the time (minutes) needed to mix the

materials. Test whether the machines have equal mean mixing time at = 0.01

Manufacturer

A B C D

25 23 25 22

23 21 25 23

21 23 25 23

23 24 21 22

Hint for the question:

We state that the evidence against HO is

-Extreme when p value <0.001

-Overwhelmed when 0.001

-Strong when 0.01

-Weak when 0.05

-Insignificant when 0.10

Choose your answer from the following:

a) The data provide strong evidence against HO: Equal means at pvalue 0.013. The mixing machines are not all equal.

b) The data provide weak evidence against HO: Equal means at pvalue 0.072. Equality of means remains plausible.

c) The data provide extreme evidence against HO: Equal means at pvalue 0.001. The mixing machines are not all equal.

d) The pvalue 0.0001 is extreme evidence that the machines are not all the same

e) The data provide insignificant evidence against HO: Equal means at pvalue 0.514. The machines are considered equal

f) none of the answers are correct