condition mean min max ZT0-3 55.9735 55.9735 55.9735 ZT4-7 161.48499999999999 161.48499999999999 161.48499999999999 ZT8-11 48.557 48.557 48.557 ZT12-15 16.486600000000003 16.486600000000003 16.486600000000003 ZT16-19 12.58615 12.58615 12.58615 ZT20-23 21.3402 21.3402 21.3402