condition mean min max ZT0-3 10.6328275 10.551005 10.714649999999999 ZT4-7 5.4169350000000005 5.4169350000000005 5.4169350000000005 ZT8-11 5.1450499999999995 5.1450499999999995 5.1450499999999995 ZT12-15 0 0 0 ZT16-19 7.7063299999999995 7.7063299999999995 7.7063299999999995 ZT20-23 9.74673 9.74673 9.74673