condition mean min max ZT0-3 286.563963 286.563963 286.563963 ZT4-7 291.7568695 291.7568695 291.7568695 ZT8-11 357.96988550000003 357.96988550000003 357.96988550000003 ZT12-15 336.7349485 336.7349485 336.7349485 ZT16-19 476.601466 476.601466 476.601466 ZT20-23 788.8792784999999 788.8792784999999 788.8792784999999