condition mean min max ZT0-3 49.205074999999994 42.641149999999996 55.769 ZT4-7 18.4311 18.4311 18.4311 ZT8-11 11.0099 11.0099 11.0099 ZT12-15 0 0 0 ZT16-19 29.29665 29.29665 29.29665 ZT20-23 39.96835 39.96835 39.96835