Use (10.3.9) to show that the Theil–Sen estimator (conveniently standardized) is asymptotically normal. Use (10.3.11) to show that the statistic Wn (a) is non-increasing in a. Show that Wn define...

Use (10.3.9) to show that the Theil–Sen estimator

(conveniently standardized) is asymptotically normal.

Use (10.3.11) to show that the statistic W_n
(a) is non-increasing in a.

Show that W_n
define in (10.3.10) is such that