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
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 | 27 | 18 |
| 21 | 33 | 27 |
| 21 | 24 | 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.
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