condition mean min max ZT0-3 1615.4 1615.4 1615.4 ZT4-7 3346.6 3346.6 3346.6 ZT8-11 3537.85 3537.85 3537.85 ZT12-15 2133.0 2133.0 2133.0 ZT16-19 1299.9 1299.9 1299.9 ZT20-23 2066.8 2066.8 2066.8