Product and Process Comparisons
7.4. Comparisons based on data from more than two processes
7.4.3. Are the means equal?
|Confidence intervals for the difference between two means||This page shows how to construct a confidence interval around (i- j) for the one-way ANOVA by continuing the example shown on a previous page.|
|Formula for the confidence interval||
The formula for a
confidence interval for the difference between two treatment
|Computation of the confidence interval for 3 - 1||
For the example, we have the following quantities for the
That is, the confidence interval is from 1.604 to 4.836.
|Additional 95% confidence intervals||
A 95% confidence interval for
from -1.787 to 3.467.
A 95% confidence interval for 2 - 1 is: from -0.247 to 5.007.
|Contrasts discussed later||Later on the topic of estimating more general linear combinations of means (primarily contrasts) will be discussed, including how to put confidence bounds around contrasts.|