Question: The sunspot data (sunspotz) are plotted in Chapter 4, Figure 4.31. From a time plot of the data, discuss why it is reasonable to fit

The sunspot data (sunspotz) are plotted in Chapter 4, Figure 4.31.

From a time plot of the data, discuss why it is reasonable to fit a threshold model to the data, and then fit a threshold model.

Section 5.6

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