5.73 Benford’s law.
We learned in Chapter 4 that there is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford’s law. Here it is:
First digit | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Proportion | 0.301 | 0.176 | 0.125 | 0.097 | 0.079 | 0.067 | 0.058 | 0.051 | 0.046 |
5.73
(a) 0.602. (b) 0.9467. (c) 0.1290. (d) 0.9474.