The average monthly price of regular gasoline in Southern California is monitored by the Automobile Club of
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a. Produce a time-series plot of the average price of regular gas in Southern California. Identify any time-series components that exist in the data.
b. Identify the recurrence period of the time series. Determine the seasonal index for each month within the recurrence period.
c. Fit a linear trend model to the deseasonalized data.
d. Provide a seasonally adjusted forecast using the linear trend model for July 2006 and July 2010.
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a Time series plot The time series exhibits a linear trend as it moves from left to right A cyclical ...View the full answer
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Related Book For 
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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