condition mean min max ZT0-3 5.361134281333333 4.8845362796666665 5.837732283 ZT4-7 8.2889166085 6.980753711 9.597079506 ZT8-11 11.633695408 8.211873990666666 15.055516825333333 ZT12-15 10.816533985 6.545816284 15.087251686 ZT16-19 46.150884156 17.613014296666666 74.68875401533333 ZT20-23 64.947446459 25.413397815 104.48149510300001