I am an auditor for a national bank. Would anyone be willing to share their sampling guidelines for audit testwork.

Thanks!

This link is to the OCC Sampling Methodologies handbook.

The FRB also has some good guidance with this table:

No. in
Universe Min. Sample Max.
Under 99 20 Or total universe if smaller 20
100-299 20 plus 10% of number above 100 40
300-499 40 plus 7% of number above 300 54
500-749 54 plus 6% of number above 500 69
750-999 69 plus 5% of number above 750 82
1,000-1,999 82 plus 4% of number above 1,000 122
2,000-2,999 122 plus 3% of number above 2,000 152
3,000-4,999 152 plus 2% of number above 3,000 192
5,000-9,999 192 plus 1.5% of number above 5,000 267
10,000-or more 267 plus 1% of number above 10,000

Well the table didn't look as good in final UBB form. The way it reads is the number in the universe, say 100-299, has a minimum sample of 20 plus 10% of anything over 100 with a max sample of 40.

There are a variety of resources here: http://www.auditnet.org/sampling.htm.