condition mean min max ZT0-3 67.90226077583334 66.85660993666667 68.94791161500001 ZT4-7 69.70056052333334 69.53102383333334 69.87009721333334 ZT8-11 73.941434885 71.49607682 76.38679295 ZT12-15 81.97065257 79.46342412666667 84.47788101333333 ZT16-19 95.7539094 93.21829865 98.28952015 ZT20-23 91.52903626166666 86.84490764333333 96.21316488