condition mean min max ZT0-3 0.308724327 0.26166106100000003 0.355787593 ZT4-7 1.94554195475 1.3020767005 2.589007209 ZT8-11 5.0188034447500005 3.871872497 6.1657343925 ZT12-15 5.84283111975 5.523354819 6.1623074204999995 ZT16-19 3.5821568925 3.1964020655 3.9679117195 ZT20-23 1.86890817875 1.813149182 1.9246671755