condition mean min max ZT0-3 84.67437148833334 80.98115072666667 88.36759225 ZT4-7 69.31013765833333 69.12432648 69.49594883666667 ZT8-11 73.614111635 71.42796400333333 75.80025926666667 ZT12-15 79.12548674 70.38831116 87.86266232 ZT16-19 80.880075905 76.53613122 85.22402059 ZT20-23 89.93202407333334 86.72904144 93.13500670666666