condition mean min max ZT0-3 123.244523 123.244523 123.244523 ZT4-7 106.373733 106.373733 106.373733 ZT8-11 130.30897950000002 130.30897950000002 130.30897950000002 ZT12-15 127.57791 127.57791 127.57791 ZT16-19 136.3603465 136.3603465 136.3603465 ZT20-23 130.630259 130.630259 130.630259