condition mean min max ZT0-3 5726.6 5726.6 5726.6 ZT4-7 6543.6 6543.6 6543.6 ZT8-11 5871.55 5871.55 5871.55 ZT12-15 4951.45 4951.45 4951.45 ZT16-19 5667.049999999999 5667.049999999999 5667.049999999999 ZT20-23 5745.75 5745.75 5745.75