condition mean min max ZT0-3 4.38976 3.91488 4.86464 ZT4-7 5.93609 5.93609 5.93609 ZT8-11 5.038835000000001 5.038835000000001 5.038835000000001 ZT12-15 0 0 0 ZT16-19 5.368214999999999 5.368214999999999 5.368214999999999 ZT20-23 5.494775000000001 5.494775000000001 5.494775000000001