The U.S. Census Bureau tracks the median price for new home sales by month of year. The median prices for April for the years 1990 to 2011 follow (U.S. Census Bureau website, April 16, 2012).

a. Construct a time series plot. Comment on any pattern you observe. Discuss some of the factors that may have resulted in this time series plot.
b. Given the time series plot in part (a), do you think the forecasting methods developed in this section are appropriate for this time series? Explain.
c. To forecast a value for April 2012, how much of the past data would you use? Explain

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