condition mean min max ZT0-3 153.09633333333332 153.09633333333332 153.09633333333332 ZT4-7 137.8715 137.8715 137.8715 ZT8-11 123.762 123.762 123.762 ZT12-15 113.93350000000001 113.93350000000001 113.93350000000001 ZT16-19 139.022 139.022 139.022 ZT20-23 190.93099999999998 190.93099999999998 190.93099999999998