condition mean min max ZT0-3 14.171199999999999 14.171199999999999 14.171199999999999 ZT4-7 8.829355 8.829355 8.829355 ZT8-11 6.657085 6.657085 6.657085 ZT12-15 14.2833 14.2833 14.2833 ZT16-19 19.58645 19.58645 19.58645 ZT20-23 10.035035 10.035035 10.035035