condition mean min max ZT0-3 43.093824999999995 40.647999999999996 45.53965 ZT4-7 48.795249999999996 48.795249999999996 48.795249999999996 ZT8-11 61.72555 61.72555 61.72555 ZT12-15 0 0 0 ZT16-19 69.32815 69.32815 69.32815 ZT20-23 50.00565 50.00565 50.00565