Returns the signed-rank estimate of intercept with is equivalent to the Hodges-Lehmann estimate of the residuals.

1 | ```
signedrank(x)
``` |

`x` |
numeric vector |

Returns the median of the Walsh averages.

John Kloke kloke@biostat.wisc.edu

Hettmansperger, T.P. and McKean J.W. (2011), *Robust Nonparametric Statistical Methods, 2nd ed.*, New York: Chapman-Hall.

Hollander, M. and Wolfe, D.A. (1999), *Nonparametric Statistical Methods*, New York: Wiley.

`walsh`

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