condition mean min max ZT0-3 344.951792 344.951792 344.951792 ZT4-7 1522.1152630000001 1522.1152630000001 1522.1152630000001 ZT8-11 1675.162954 1675.162954 1675.162954 ZT12-15 1244.3859029999999 1244.3859029999999 1244.3859029999999 ZT16-19 593.3183055 593.3183055 593.3183055 ZT20-23 303.4411455 303.4411455 303.4411455