Kruskal-Wallis test

`p = kruskalwallis(x)`

`p = kruskalwallis(x,group)`

`p = kruskalwallis(x,group,displayopt)`

```
[p,tbl,stats]
= kruskalwallis(___)
```

returns
the `p`

= kruskalwallis(`x`

)*p*-value for the null hypothesis that the data
in each column of the matrix `x`

comes from the
same distribution, using a Kruskal-Wallis test. The alternative
hypothesis is that not all samples come from the same distribution. `kruskalwallis`

also
returns an ANOVA table and a box plot.

returns
the `p`

= kruskalwallis(`x`

,`group`

,`displayopt`

)*p*-value of the test and lets you display or
suppress the ANOVA table and box plot.