condition mean min max ZT0-3 10.695597500000002 10.614105 10.777090000000001 ZT4-7 9.478625 9.478625 9.478625 ZT8-11 12.23405 12.23405 12.23405 ZT12-15 0 0 0 ZT16-19 13.4505 13.4505 13.4505 ZT20-23 10.96595 10.96595 10.96595