condition mean min max ZT0-3 0.5909335 0.5909335 0.5909335 ZT4-7 0.9930110000000001 0.9930110000000001 0.9930110000000001 ZT8-11 0.558772 0.558772 0.558772 ZT12-15 0.6793715 0.6793715 0.6793715 ZT16-19 1.73577 1.73577 1.73577 ZT20-23 0.7987905 0.7987905 0.7987905