condition mean min max ZT0-3 32.73785 29.94095 35.53475 ZT4-7 29.86965 29.86965 29.86965 ZT8-11 46.35275 46.35275 46.35275 ZT12-15 0 0 0 ZT16-19 39.8521 39.8521 39.8521 ZT20-23 39.965999999999994 39.965999999999994 39.965999999999994