condition mean min max ZT0-3 39.7266 34.47845 46.6476 ZT4-7 47.848349999999996 47.848349999999996 47.848349999999996 ZT8-11 27.50085 27.50085 27.50085 ZT12-15 31.512225 30.5465 32.47795 ZT16-19 29.0684 29.0684 29.0684 ZT20-23 34.44005 34.44005 34.44005