condition mean min max ZT0-3 13.311774999999999 12.79225 13.831299999999999 ZT4-7 10.18205 10.18205 10.18205 ZT8-11 12.0192 12.0192 12.0192 ZT12-15 0 0 0 ZT16-19 12.574549999999999 12.574549999999999 12.574549999999999 ZT20-23 11.73175 11.73175 11.73175