condition mean min max ZT0-3 90.399543 90.399543 90.399543 ZT4-7 116.83936499999999 116.83936499999999 116.83936499999999 ZT8-11 120.72394 120.72394 120.72394 ZT12-15 102.7376005 102.7376005 102.7376005 ZT16-19 109.9118155 109.9118155 109.9118155 ZT20-23 86.02061950000001 86.02061950000001 86.02061950000001