condition mean min max ZT0-3 1.49886 1.453335 1.5443850000000001 ZT4-7 0.5379425 0.5379425 0.5379425 ZT8-11 0.066365 0.066365 0.066365 ZT12-15 0 0 0 ZT16-19 0.8580095000000001 0.8580095000000001 0.8580095000000001 ZT20-23 0.9959845 0.9959845 0.9959845