The S&P 500 reached an all-time high September 27th, 2018, at 2,914. The data in excel file
Question:
The S&P 500 reached an all-time high September 27th, 2018, at 2,914. The data in excel file S&P 500 show the end-of-the-month value for the S&P 500 for the last two years.
a. Construct a graph showing the S&P Index over time.
b. Forecast the S&P Index for the end of October 2018 using exponential smoothing with α = 0.2.
c. Calculate the MAD for the forecast in part b.
d. Forecast the S&P Index for the end of October 2018 using exponential smoothing with trend adjustment and setting α = 0.2 and β = 0.5.
e. Calculate the MAD for the forecast in part d.
f. In which forecast do you have the most confidence?
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a b F Oct2018 272944 02291400 272944 276636 c MAD 32010323 13918 d e MAD 16276...View the full answer
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