condition mean min max ZT0-3 97.98500519083333 90.03974030666667 105.93027007500001 ZT4-7 87.699409655 87.6035138 87.79530550999999 ZT8-11 92.52985654333332 86.36770419 98.69200889666666 ZT12-15 81.97599270333333 80.04775153666667 83.90423387 ZT16-19 72.29403655 65.84738432 78.74068878 ZT20-23 70.98262081499999 66.33693975666667 75.62830187333333