| Answer | Crossword Clue |
|---|---|
| FAD | Mean-reverting deviation, in economics |
| stanine | any of the nine classes into which a set of normalized standard scores arranged according to rank in educational testing are divided, which include the bottom 4 percent and the top 4 percent of the scores in the first and ninth classes and the middle 20 percent in the fifth, and which have a standard deviation of 2 and a mean of 5 |
