condition mean min max ZT0-3 392.95883333333336 378.029 402.903 ZT4-7 354.1965 354.1965 354.1965 ZT8-11 338.4595 338.4595 338.4595 ZT12-15 374.72425 357.96000000000004 391.4885 ZT16-19 389.75649999999996 389.75649999999996 389.75649999999996 ZT20-23 409.55899999999997 409.55899999999997 409.55899999999997