condition mean min max ZT0-3 1.230023 0.866961 1.593085 ZT4-7 0.690265 0.690265 0.690265 ZT8-11 1.135085 1.135085 1.135085 ZT12-15 0 0 0 ZT16-19 1.11534 1.11534 1.11534 ZT20-23 0.7430775 0.7430775 0.7430775