condition mean min max ZT0-3 1.5319375000000002 1.20202 1.861855 ZT4-7 0.6951955 0.6951955 0.6951955 ZT8-11 1.84142 1.84142 1.84142 ZT12-15 0 0 0 ZT16-19 1.742315 1.742315 1.742315 ZT20-23 1.0600475 1.0600475 1.0600475