condition mean min max ZT0-3 0.1080375 0.03596145 0.18011354999999998 ZT4-7 0.3254715 0.3254715 0.3254715 ZT8-11 0.2158165 0.2158165 0.2158165 ZT12-15 0 0 0 ZT16-19 0.28334899999999996 0.28334899999999996 0.28334899999999996 ZT20-23 0.427077 0.427077 0.427077