condition mean min max ZT0-3 83.847731 83.847731 83.847731 ZT4-7 75.4991905 75.4991905 75.4991905 ZT8-11 71.551447 71.551447 71.551447 ZT12-15 80.8600155 80.8600155 80.8600155 ZT16-19 73.57316349999999 73.57316349999999 73.57316349999999 ZT20-23 79.48389900000001 79.48389900000001 79.48389900000001