condition mean min max ZT0-3 10.00116652 8.822751717000001 11.179581322999999 ZT4-7 2.44653585075 1.511676145 3.3813955565000002 ZT8-11 3.4947951787499996 1.9900889134999997 4.999501444 ZT12-15 5.7942667485 5.5758940545 6.012639442499999 ZT16-19 4.50579609375 4.412071064 4.599521123500001 ZT20-23 7.33107757 6.8918569175 7.7702982225