Example 1

Consider data for the Average Cardiovascular Mortality Rate (平均心血管病死亡率) in Los Angeles California in cmort.data

(a) Examine the data, state if there was anything strange about the files, and if you made adjustments.

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(b) Produce a plot of the data versus time. Include either labels on the axes OR a legend explaining the axes.

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(c) Make observations about the existence or lack of existence of,

• trend
• periodicity and seasonality (周期性和季节性)
• heteroskedasticity (异方差)
• dependence
• outliers, missing