condition mean min max ZT0-3 2.9315202229999997 1.9325684769999998 3.930471969 ZT4-7 11.75307350775 9.4428201455 14.063326870000001 ZT8-11 17.28610343 14.79622438 19.77598248 ZT12-15 65.39636899499999 56.134492054999996 74.658245935 ZT16-19 82.24332122999999 79.06976327999999 85.41687918 ZT20-23 70.37175964 64.66993295500001 76.073586325