condition mean min max ZT0-3 6.90256 6.88809 6.9170300000000005 ZT4-7 5.235705 5.235705 5.235705 ZT8-11 5.109815 5.109815 5.109815 ZT12-15 0 0 0 ZT16-19 9.064705 9.064705 9.064705 ZT20-23 9.814350000000001 9.814350000000001 9.814350000000001