condition mean min max ZT0-3 10.0839 10.0839 10.0839 ZT4-7 9.144375 9.144375 9.144375 ZT8-11 7.397645 7.397645 7.397645 ZT12-15 7.572175 7.572175 7.572175 ZT16-19 12.39947 12.39947 12.39947 ZT20-23 10.321245000000001 10.321245000000001 10.321245000000001