condition mean min max ZT0-3 277.687383 277.687383 277.687383 ZT4-7 288.33376450000003 288.33376450000003 288.33376450000003 ZT8-11 326.96282599999995 326.96282599999995 326.96282599999995 ZT12-15 410.46282599999995 410.46282599999995 410.46282599999995 ZT16-19 359.4342365 359.4342365 359.4342365 ZT20-23 363.1268425 363.1268425 363.1268425