condition mean min max ZT0-3 145.568339 145.568339 145.568339 ZT4-7 117.96625399999999 117.96625399999999 117.96625399999999 ZT8-11 150.31125 150.31125 150.31125 ZT12-15 176.19836049999998 176.19836049999998 176.19836049999998 ZT16-19 199.36159650000002 199.36159650000002 199.36159650000002 ZT20-23 178.852932 178.852932 178.852932