condition mean min max ZT0-3 0.2348095 0.158398 0.31122099999999997 ZT4-7 0.2095965 0.2095965 0.2095965 ZT8-11 0.6854045 0.6854045 0.6854045 ZT12-15 0 0 0 ZT16-19 0.9857514999999999 0.9857514999999999 0.9857514999999999 ZT20-23 0.676993 0.676993 0.676993