condition mean min max ZT0-3 58.3295810825 54.546430295 62.11273187 ZT4-7 63.45813528833333 60.92337623 65.99289434666666 ZT8-11 60.08894461 52.87165231 67.30623691 ZT12-15 42.90377169833333 41.778377289999995 44.029166106666665 ZT16-19 40.544085081666665 36.68093306 44.40723710333333 ZT20-23 24.424724275000003 22.4068302 26.44261835