condition mean min max ZT0-3 3924.55 3924.55 3924.55 ZT4-7 2930.8 2930.8 2930.8 ZT8-11 3364.3 3364.3 3364.3 ZT12-15 3150.15 3150.15 3150.15 ZT16-19 3783.2000000000003 3783.2000000000003 3783.2000000000003 ZT20-23 3957.1 3957.1 3957.1