condition mean min max ZT0-3 474.155134 474.155134 474.155134 ZT4-7 1857.3679395 1857.3679395 1857.3679395 ZT8-11 2955.4869515 2955.4869515 2955.4869515 ZT12-15 1838.1046405 1838.1046405 1838.1046405 ZT16-19 969.179382 969.179382 969.179382 ZT20-23 407.28297050000003 407.28297050000003 407.28297050000003