condition mean min max ZT0-3 39.30095 39.30095 39.30095 ZT4-7 31.0636 31.0636 31.0636 ZT8-11 36.483450000000005 36.483450000000005 36.483450000000005 ZT12-15 34.1916 34.1916 34.1916 ZT16-19 50.60265 50.60265 50.60265 ZT20-23 42.1402 42.1402 42.1402