condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.1273095 0.1273095 0.1273095 ZT8-11 0.137782 0.137782 0.137782 ZT12-15 0.7555025 0.7555025 0.7555025 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0