condition mean min max ZT0-3 22.327624999999998 20.9652 23.69005 ZT4-7 16.58935 16.58935 16.58935 ZT8-11 11.456 11.456 11.456 ZT12-15 0 0 0 ZT16-19 14.88385 14.88385 14.88385 ZT20-23 14.919550000000001 14.919550000000001 14.919550000000001