condition mean min max ZT0-3 10.004632 10.004632 10.004632 ZT4-7 10.0908305 10.0908305 10.0908305 ZT8-11 10.9242665 10.9242665 10.9242665 ZT12-15 10.5000795 10.5000795 10.5000795 ZT16-19 10.449011500000001 10.449011500000001 10.449011500000001 ZT20-23 11.4511565 11.4511565 11.4511565