condition mean min max ZT0-3 186.64999999999998 186.64999999999998 186.64999999999998 ZT4-7 1349.1 1349.1 1349.1 ZT8-11 993.55 993.55 993.55 ZT12-15 422.65 422.65 422.65 ZT16-19 105.6 105.6 105.6 ZT20-23 177.95 177.95 177.95