condition mean min max ZT0-3 0.094089691 0.0 0.188179382 ZT4-7 0.64282970925 0.457998036 0.8276613825000001 ZT8-11 1.0797902695000001 1.0353340845 1.1242464545000002 ZT12-15 0.617768447 0.540703673 0.694833221 ZT16-19 0.7204950937500001 0.6258216085 0.8151685790000001 ZT20-23 0.531394904 0.517717651 0.545072157