condition mean min max ZT0-3 0.8141575 0.8141575 0.8141575 ZT4-7 0.472515 0.472515 0.472515 ZT8-11 1.0914675 1.0914675 1.0914675 ZT12-15 1.432295 1.432295 1.432295 ZT16-19 0.6895979999999999 0.6895979999999999 0.6895979999999999 ZT20-23 0.5808475 0.5808475 0.5808475