condition mean min max ZT0-3 58.656138885 53.872803829999995 63.43947394 ZT4-7 62.41053857333333 60.90430808666667 63.91676906 ZT8-11 70.12047455499999 66.71789987 73.52304923999999 ZT12-15 66.25722415333334 64.99103468666667 67.52341362 ZT16-19 78.74876374 74.00617967333334 83.49134780666667 ZT20-23 71.48465063500001 71.3050637 71.66423757