We use the fiber example in Chapter 3 of the textbook. In particular we do Example 3-3 on Page 79.
We can calculate individual confidence intervals for the difference of two treatment means by noting that Formula 3-13 on Page 78 of you textbook can be written as
(Dif-LDS, Dif+LDS).
Thus, for example, the confidence interval for difference in treatment means between 15 and 25 percent cotton is
(-5.6 - 3.74542, -5.6 + 3.74542).
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