PIOL 2-48. The annual Wolfer sunspot numbers from 1770 to
1869 are shown in Table 2-7. (For an interesting analysis and
interpretation of these numbers, see the book by Box and
Jenkins referenced in Exercise 2-47. The analysis requires some
advanced knowledge of statistics and statistical model building.)
(a) Construct a time series plot of these data.
(b) Construct and interpret either a digidot plot (or a marginal
plot) or a stem-and-leaf and time series plot of these data.​

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