Statistical Consulting Commandments

Herman Rubin has five commandments that he posted on UseNet from time to time:

For the client:

1. Thou shalt know that thou must make assumptions.

2. Thou shalt not believe thy assumptions.

For the consultant:

3. Thou shalt not make thy client’s assumptions for him.

4. Thou shalt inform thy client of the consequences of his assumptions.

For the person who is both (e. g., a biostatistician or psychometrician):

5. Thou shalt keep thy roles distinct, lest thou violate some of the other commandments.

From the comments over at Andrew Gelman’s Blog.

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