condition mean min max ZT0-3 288.938615 288.938615 288.938615 ZT4-7 272.935795 272.935795 272.935795 ZT8-11 312.40455599999996 312.40455599999996 312.40455599999996 ZT12-15 406.373267 406.373267 406.373267 ZT16-19 359.859822 359.859822 359.859822 ZT20-23 421.9854575 421.9854575 421.9854575