condition mean min max ZT0-3 48.847766666666665 36.7792 57.879149999999996 ZT4-7 30.6726 30.6726 30.6726 ZT8-11 40.401349999999994 40.401349999999994 40.401349999999994 ZT12-15 78.448225 76.9433 79.95315 ZT16-19 78.4182 78.4182 78.4182 ZT20-23 86.06445 86.06445 86.06445