condition mean min max ZT0-3 2.0346599999999997 1.7868249999999999 2.282495 ZT4-7 2.3546050000000003 2.3546050000000003 2.3546050000000003 ZT8-11 8.754014999999999 8.754014999999999 8.754014999999999 ZT12-15 0 0 0 ZT16-19 7.061195 7.061195 7.061195 ZT20-23 4.9049499999999995 4.9049499999999995 4.9049499999999995