condition mean min max ZT0-3 0.15742276666666669 0.09077935000000001 0.289208 ZT4-7 0.16240445 0.16240445 0.16240445 ZT8-11 0.297991 0.297991 0.297991 ZT12-15 0.30377925 0.28599600000000003 0.3215625 ZT16-19 0.12476675000000001 0.12476675000000001 0.12476675000000001 ZT20-23 0.3106665 0.3106665 0.3106665