Hello, during reading the paper, I could not understand why it is biased to output the mean. I would be grateful if you could explain it. <img width="719" alt="WX20210321-190050@2x" src="https://user-images.githubusercontent.com/43200569/111903016-17cf3c80-8a7b-11eb-8903-880cbb68d0c3.png">
Hello,
during reading the paper, I could not understand why it is biased to output the mean. I would be grateful if you could explain it.