condition mean min max ZT0-3 211.004607 211.004607 211.004607 ZT4-7 207.93130200000002 207.93130200000002 207.93130200000002 ZT8-11 167.159587 167.159587 167.159587 ZT12-15 161.466203 161.466203 161.466203 ZT16-19 106.8801385 106.8801385 106.8801385 ZT20-23 181.4564245 181.4564245 181.4564245