condition mean min max ZT0-3 3.1329200000000004 2.8621350000000003 3.403705 ZT4-7 3.62584 3.62584 3.62584 ZT8-11 5.847110000000001 5.847110000000001 5.847110000000001 ZT12-15 0 0 0 ZT16-19 5.093145 5.093145 5.093145 ZT20-23 5.3469999999999995 5.3469999999999995 5.3469999999999995