condition mean min max ZT0-3 47.60160411 41.09433877 54.10886945 ZT4-7 45.238194892500005 43.46134817 47.015041615 ZT8-11 26.6373358675 24.819342415 28.45532932 ZT12-15 88.4095170025 77.40075857000001 99.418275435 ZT16-19 113.80589897499999 109.5292189 118.08257904999999 ZT20-23 94.58469891000001 88.38947293000001 100.77992489