condition mean min max ZT0-3 26.4086 26.4086 26.4086 ZT4-7 8.64059 8.64059 8.64059 ZT8-11 8.308485000000001 8.308485000000001 8.308485000000001 ZT12-15 21.6659 21.6659 21.6659 ZT16-19 29.63425 29.63425 29.63425 ZT20-23 39.8424 39.8424 39.8424