In his original paper, Forbes provided additional data collected by the botanist Joseph D. Hooker (1817–1911) on temperatures and boiling points measured often at higher altitudes in the Himalaya...

In his original paper, Forbes provided additional data collected by the botanist Joseph D. Hooker (1817–1911) on temperatures and boiling points measured often at higher altitudes in the Himalaya Mountains. The data for n = 31 locations is given in the file Hooker. Find the estimated mean function (2.23) for Hooker’s data.