Returning to the data set “canadaemplmntdata” from Problem 17.21,
a) Construct a line chart for seasonally unadjusted tourism employment data by subsetting the data by VECTOR = v81675.
b) Construct a line chart for seasonally adjusted tourism employment data by subsetting the data by VECTOR = v81660.
c) Based on the line charts in parts (a) and (b), does it seem that seasonality is important?

Problem 17.21

Often, it is not enough to assume that seasonality or trend components are present. We must evaluate the need to fit these components. The file “canadaemplmntdata” contains quarterly Canada employment data for multiple job sectors. It provides seasonally adjusted and unadjusted versions of the data.