condition mean min max ZT0-3 86.9139878575 86.52302269 87.304953025 ZT4-7 92.288295545 71.6317368 112.94485429 ZT8-11 172.164093225 153.53882905 190.7893574 ZT12-15 115.3002331975 80.50427084500001 150.09619555 ZT16-19 51.07186681499999 44.013483844999996 58.130249785 ZT20-23 33.929814395 33.34091583 34.51871296