condition mean min max ZT0-3 31.9423 26.288800000000002 39.3435 ZT4-7 22.0978 22.0978 22.0978 ZT8-11 25.8686 25.8686 25.8686 ZT12-15 33.956824999999995 24.2173 43.696349999999995 ZT16-19 21.45795 21.45795 21.45795 ZT20-23 20.80325 20.80325 20.80325