Chronology |
Current Month |
Current Thread |
Current Date |

[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |

*From*: Chuck Britton <cvbritton@mac.com>*Date*: Mon, 29 Oct 2012 13:35:03 -0400

The discovery of this "law" goes back to 1881, when the American astronomer Simon Newcomb noticed that . . logarithm tables . . that started with 1 . . were much more worn than the other pages.

from the wikipedia article

On Oct 29, 2012, at 12:41 PM, brian whatcott wrote:

Oldie but oldie! Used for detecting tax return irregularities: people dream up way to many 5's too few ones.

[From an ECN on line piece....]

Brian W

Dr. Benford discovered, in a huge assortment of number sequences --

random samples from a day's stock quotations, a tournament's tennis

scores, the numbers on the front page of The New York Times, the

populations of towns, electricity bills in the Solomon Islands, the

molecular weights of compounds the half-lives of radioactive atoms and

much more -- [something unexpected.]

Given a string of at least four numbers sampled from one or more of

these sets of data, the chance that the first digit will be 1 is not one

in nine, as many people would imagine; according to Benford's Law, it is

30.1 percent, or nearly one in three. The chance that the first number

in the string will be 2 is only 17.6 percent, and the probabilities that

successive numbers will be the first digit decline smoothly up to 9,

which has only a 4.6 percent chance.

A strange feature of these probabilities is that they are "scale

invariant" and "base invariant."

_______________________________________________

Forum for Physics Educators

Phys-l@phys-l.org

http://www.phys-l.org/mailman/listinfo/phys-l

**References**:**[Phys-L] Fwd: Benford***From:*brian whatcott <betwys1@sbcglobal.net>

- Prev by Date:
**[Phys-L] Fwd: Benford** - Next by Date:
**Re: [Phys-L] Fwd: Benford** - Previous by thread:
**[Phys-L] Fwd: Benford** - Next by thread:
**Re: [Phys-L] Fwd: Benford** - Index(es):