condition mean min max ZT0-3 9.834475000000001 7.881835000000001 12.28275 ZT4-7 10.499469999999999 10.499469999999999 10.499469999999999 ZT8-11 11.337235 11.337235 11.337235 ZT12-15 18.7053 18.36285 19.04775 ZT16-19 11.357 11.357 11.357 ZT20-23 10.094349999999999 10.094349999999999 10.094349999999999