[sam h]

Here is the Z-score table.

Some quick ones for 50 hand samples of PFR 14 and VPIP 30:

PFR

50% confidence: 11-17
60% confidence: 10-18
70% confidence: 9-18

VPIP

50% confidence: 26-34
60% confidence: 24.5-35.5
70% confidence: 23-37