condition mean min max ZT0-3 73.90076666666667 68.946 82.24844999999999 ZT4-7 62.2319 62.2319 62.2319 ZT8-11 57.68765 57.68765 57.68765 ZT12-15 99.242075 96.84115 101.643 ZT16-19 74.04565 74.04565 74.04565 ZT20-23 79.04005000000001 79.04005000000001 79.04005000000001