condition mean min max ZT0-3 313.31629999999996 91.4259 741.1134999999999 ZT4-7 1078.6399999999999 1078.6399999999999 1078.6399999999999 ZT8-11 572.8745 572.8745 572.8745 ZT12-15 218.50775 203.7405 233.27499999999998 ZT16-19 208.6145 208.6145 208.6145 ZT20-23 150.675 150.675 150.675