condition mean min max ZT0-3 0.3968130495 0.190251568 0.603374531 ZT4-7 1.4729353729999999 0.675909869 2.269960877 ZT8-11 3.2362145455 2.9905713115 3.4818577795 ZT12-15 3.7323847139999997 3.6779644434999996 3.7868049845 ZT16-19 3.617477494 3.1653264235 4.0696285645 ZT20-23 5.1059648215 4.8051000995 5.4068295435