condition mean min max ZT0-3 0.30088966666666667 0.0 0.602135 ZT4-7 0.2945925 0.2945925 0.2945925 ZT8-11 0.620745 0.620745 0.620745 ZT12-15 0.15470225 0.0 0.3094045 ZT16-19 0.0 0.0 0.0 ZT20-23 0.3380315 0.3380315 0.3380315