condition mean min max ZT0-3 23.674950000000003 23.674950000000003 23.674950000000003 ZT4-7 65.88415 65.88415 65.88415 ZT8-11 47.772 47.772 47.772 ZT12-15 20.36705 20.36705 20.36705 ZT16-19 13.7652 13.7652 13.7652 ZT20-23 10.614155 10.614155 10.614155