condition mean min max ZT0-3 7.450335 7.373374999999999 7.5272950000000005 ZT4-7 3.46709 3.46709 3.46709 ZT8-11 2.708305 2.708305 2.708305 ZT12-15 0 0 0 ZT16-19 6.53411 6.53411 6.53411 ZT20-23 5.9645399999999995 5.9645399999999995 5.9645399999999995