condition mean min max ZT0-3 0.54646275 0.542941 0.5499845 ZT4-7 1.746335 1.746335 1.746335 ZT8-11 1.188717 1.188717 1.188717 ZT12-15 0 0 0 ZT16-19 0.811173 0.811173 0.811173 ZT20-23 1.63164 1.63164 1.63164