condition mean min max ZT0-3 75.03493526166667 71.90572901333333 78.16414151000001 ZT4-7 83.57888658666667 81.93886717333334 85.218906 ZT8-11 85.70211054500001 79.10472123000001 92.29949986 ZT12-15 84.46727852666666 79.32435099 89.61020606333334 ZT16-19 86.00332439 80.39558461 91.61106417 ZT20-23 79.30194020333333 79.14281031333333 79.46107009333333