condition mean min max ZT0-3 60.522425 58.954499999999996 62.09035 ZT4-7 131.8615 131.8615 131.8615 ZT8-11 75.76135 75.76135 75.76135 ZT12-15 0 0 0 ZT16-19 72.9564 72.9564 72.9564 ZT20-23 76.68345 76.68345 76.68345