condition mean min max ZT0-3 265.152244 265.152244 265.152244 ZT4-7 403.027984 403.027984 403.027984 ZT8-11 515.0203819999999 515.0203819999999 515.0203819999999 ZT12-15 536.253321 536.253321 536.253321 ZT16-19 269.7716785 269.7716785 269.7716785 ZT20-23 121.6787215 121.6787215 121.6787215