condition mean min max ZT0-3 10.468822 10.468822 10.468822 ZT4-7 10.837733 10.837733 10.837733 ZT8-11 10.0816595 10.0816595 10.0816595 ZT12-15 10.349193 10.349193 10.349193 ZT16-19 10.261163499999999 10.261163499999999 10.261163499999999 ZT20-23 10.670897 10.670897 10.670897