(Solution) - Construct and interpret either a digidot plot or a stem -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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Construct and interpret either a digidot plot or a stem and- leaf plot of these data. The 100 annual Wolfer sunspot numbers from 1770 to 1869 follow. (For an interesting analysis and interpretation of these numbers, see the book by Box, Jenkins, and Reinsel referenced in Exercise 6-60. Their analysis requires some advanced knowledge of statistics and statistical model building.) (read down, then left to right)
(a) Construct a time series plot of these data.
(b) Construct and interpret either a digidot plot or a stem-and leaf plot of these data.