8

Statistical Diagnostics

“What gets measured, gets done.”

—W. Edwards Deming

“I have a soft spot for secret passageways, bookshelves that open into silence, staircases that go down into a void, and hidden safes. I even have one myself, but I won’t tell you where. At the other end of the spectrum are statistics which I hate with all my heart.”

—Luis Buñuel

“Probability.”1

—H. O. “HOH” Hartley

Statistical Diagnostics measure the quality of the data analysis. They provide five broad benefits:

1. Detecting mistakes or weaknesses—foibles

2. Measuring the accuracy of an analysis

3. Measuring the reliability of an analysis

4. Providing insight ...

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