condition mean min max ZT0-3 3252.4500000000003 3252.4500000000003 3252.4500000000003 ZT4-7 4265.3 4265.3 4265.3 ZT8-11 5146.65 5146.65 5146.65 ZT12-15 5572.049999999999 5572.049999999999 5572.049999999999 ZT16-19 5315.15 5315.15 5315.15 ZT20-23 5075.85 5075.85 5075.85