condition mean min max ZT0-3 5.79335531425 3.237501266 8.3492093625 ZT4-7 16.343279851749998 14.1947978635 18.49176184 ZT8-11 19.1084957725 18.088413335 20.12857821 ZT12-15 87.00016284750001 69.707188795 104.29313690000001 ZT16-19 94.12548642499999 85.036842415 103.21413043499999 ZT20-23 102.52309696749998 98.63486868499999 106.41132524999999