Question

. To test whether the mean time needed to mix a batch of material is the same for machines produced by three
different manufacturers, a chemical engineering consulting company obtained the following data on the time (in
minutes) needed to mix the material. Use these data to test whether the population mean times for mixing a batch
of material differ for the three manufacturers at the five percent level of significance and summarize your results
in an ANOVA table.
Manufacturer
1 2 3
21 26 22
25 24 21
23 27 23
24 25 24

Answer 1

Ans:

As,p-value is less than 0.05,we reject the null hypothesis.

There is sufficient evidence to conclude that the population mean times for mixing a batch of material differ for the three manufacturers at the five percent level of significance