Thanks for your help, my quant guy at work is blowing me off an I haven’t done math since high school.
If the error rate is the same, you need to catch 13 of the errors. That leaves two errors, or 2/100=2%. With an error rate of three out of any 20, you would need to check 86.666 out of 100 to average a 2% remaining error rate. Formula would be 100-100*2/15.
Sounds like a high fail rate.
I presume you mean "down to no more than 2%".
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