condition mean min max ZT0-3 527.42575 501.501 553.3505 ZT4-7 355.9705 355.9705 355.9705 ZT8-11 106.35499999999999 106.35499999999999 106.35499999999999 ZT12-15 0 0 0 ZT16-19 641.8285000000001 641.8285000000001 641.8285000000001 ZT20-23 598.6075000000001 598.6075000000001 598.6075000000001