o test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, a chemical company obtained the following data on the time (in minutes) needed to mix the material.

Manufacturer
1	2	3
20	29	20
27	25	20
25	31	24
20	31	16

Use Fisher's LSD procedure to develop a 95% confidence interval estimate (in minutes) of the difference between the means for manufacturer 1 and manufacturer 2. (Round your answers to two decimal places.)

 min to min