condition mean min max ZT0-3 0.7570319999999999 0.529316 0.984748 ZT4-7 2.32776 2.32776 2.32776 ZT8-11 1.384255 1.384255 1.384255 ZT12-15 1.1504931250000001 0.9113782500000001 1.389608 ZT16-19 0.812781 0.7304793333333334 0.8950826666666667 ZT20-23 0 0 0