condition mean min max ZT0-3 124.39906666666666 63.536699999999996 155.91199999999998 ZT4-7 43.64465 43.64465 43.64465 ZT8-11 41.860699999999994 41.860699999999994 41.860699999999994 ZT12-15 58.03385 49.493 66.5747 ZT16-19 75.9699 75.9699 75.9699 ZT20-23 131.9555 131.9555 131.9555