condition mean min max ZT0-3 82.13655 72.48124999999999 91.79185 ZT4-7 45.03505 45.03505 45.03505 ZT8-11 55.3071 55.3071 55.3071 ZT12-15 0 0 0 ZT16-19 81.35435 81.35435 81.35435 ZT20-23 82.0136 82.0136 82.0136