condition mean min max ZT0-3 26.3172 26.3172 26.3172 ZT4-7 77.68945 77.68945 77.68945 ZT8-11 59.9131 59.9131 59.9131 ZT12-15 13.37745 13.37745 13.37745 ZT16-19 7.827820000000001 7.827820000000001 7.827820000000001 ZT20-23 6.869125 6.869125 6.869125