condition mean min max ZT0-3 83.04486 83.04486 83.04486 ZT4-7 149.2395095 149.2395095 149.2395095 ZT8-11 160.9312265 160.9312265 160.9312265 ZT12-15 172.025905 172.025905 172.025905 ZT16-19 149.9989645 149.9989645 149.9989645 ZT20-23 137.60520300000002 137.60520300000002 137.60520300000002