# To test whether the mean time needed to mix a batch of material is the same...

###### Question:

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

 Manufacture 1 2 3 18 27 24 27 24 18 21 33 24 18 27 21

a. Compute the values below (to 2 decimals, if necessary).

 Sum of Squares, Error Mean Squares, Error Fisher's LSD Value

b. Use Fisher's LSD procedure to develop a 95% confidence interval estimate of the difference between the means for manufacturer 1 and manufacturer 2. Round to two decimal places. Enter negative values as negative numbers.
to

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