condition mean min max ZT0-3 191.044407 191.044407 191.044407 ZT4-7 203.2475195 203.2475195 203.2475195 ZT8-11 210.271041 210.271041 210.271041 ZT12-15 205.3283455 205.3283455 205.3283455 ZT16-19 246.478509 246.478509 246.478509 ZT20-23 200.86998549999998 200.86998549999998 200.86998549999998