condition mean min max ZT0-3 73.821244235 70.21098916 77.43149931 ZT4-7 72.49152556 61.0167747 83.96627642 ZT8-11 123.62047293250001 99.24188541500001 147.99906045 ZT12-15 65.4685803575 34.209156575 96.72800414000001 ZT16-19 28.492945487500002 24.17767486 32.808216115 ZT20-23 16.312442496750002 11.5781943535 21.04669064