====== with 2 levels ======

t-test를 하는 상황 (2 sample independent t-test)
<tabbed>
  * :anova note:code01
  * *:anova note:output01
</tabbed>


====== with more than 3 levels ======
<tabbed>
  * :anova note:code02
  * *:anova note:output02
</tabbed>