condition mean min max ZT0-3 1.6232849999999999 1.4873699999999999 1.7591999999999999 ZT4-7 1.98501 1.98501 1.98501 ZT8-11 1.4208349999999998 1.4208349999999998 1.4208349999999998 ZT12-15 0 0 0 ZT16-19 2.014185 2.014185 2.014185 ZT20-23 1.8942100000000002 1.8942100000000002 1.8942100000000002