condition mean min max ZT0-3 1.4507738333333334e-09 5.849465000000001e-10 3.0439600000000003e-09 ZT4-7 6.360745e-09 6.360745e-09 6.360745e-09 ZT8-11 5.2239050000000005e-09 5.2239050000000005e-09 5.2239050000000005e-09 ZT12-15 3.1731175 0.867155 5.47908 ZT16-19 3.060655 3.060655 3.060655 ZT20-23 6.846785e-09 6.846785e-09 6.846785e-09