condition mean min max ZT0-3 10.158465 10.158465 10.158465 ZT4-7 10.333725000000001 10.333725000000001 10.333725000000001 ZT8-11 7.00398 7.00398 7.00398 ZT12-15 6.720525 6.720525 6.720525 ZT16-19 10.54124 10.54124 10.54124 ZT20-23 8.673224999999999 8.673224999999999 8.673224999999999