13
Precision for Planning
Precision is indicated by the width of a CI. Actually it's MOE, the half-width of the CI, or one arm of the CI that's our measure of precision. Higher precision is signaled by a shorter CI, and short CIs are good news. Precision is a highly valuable idea, but not sufficiently recognized or used. It usually contributes to what in Chapter 12 I called the informativeness of an experiment.
Most of this book so far has been about using CIs to report and interpret results, and one valuable approach to interpreting a CI focuses ...
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