condition mean min max ZT0-3 125.073062 125.073062 125.073062 ZT4-7 155.557597 155.557597 155.557597 ZT8-11 102.6120645 102.6120645 102.6120645 ZT12-15 97.0899665 97.0899665 97.0899665 ZT16-19 83.06751700000001 83.06751700000001 83.06751700000001 ZT20-23 97.98954 97.98954 97.98954