d) Since a ski resort does most of its business in the winter, what is the major source of variation in income due to? e) What is the long-term behavior of a variable over an extended period of time called? Question 4 (5 marks) Answer the following questions regarding time series: a) If the exports ($ millions) for the period 1997 through 2001 were $878, $892, $864, $870, and $912 respectively, what are these values called? b) A time series is a collection of data that: C) For an annual time series extending from 1993 through 2001, how many years would be lost in a five year moving average? d) For a three-year moving average, how many values will be lost at the beginning and end of the time series? e ) How can you describe the moving average method? 2 ALGONQUIN COLLEGE | Online