condition mean min max ZT0-3 108.914766 108.914766 108.914766 ZT4-7 122.875362 122.875362 122.875362 ZT8-11 124.5542935 124.5542935 124.5542935 ZT12-15 127.89617949999999 127.89617949999999 127.89617949999999 ZT16-19 130.903864 130.903864 130.903864 ZT20-23 150.14781399999998 150.14781399999998 150.14781399999998