condition mean min max ZT0-3 123.629518 123.629518 123.629518 ZT4-7 111.73588850000002 111.73588850000002 111.73588850000002 ZT8-11 117.2579405 117.2579405 117.2579405 ZT12-15 103.23413550000001 103.23413550000001 103.23413550000001 ZT16-19 169.930284 169.930284 169.930284 ZT20-23 166.4219635 166.4219635 166.4219635