Box & jekins - Running head BOX JENKINS 1 Box Jenkins...

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Running head: BOX & JENKINS 1 Box & Jenkins Name: Institution: Date:
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BOX & JENKINS 2 So here is my thinking. Since there are two spikes in the ACF I estimated an AR2 and since there is one seasonal spike in the ACF at position 36 or (3) I estimated a SMA3. Residuals look fine since the seasonal spikes in the residual ACF and PACF cancel each other out. Comment: From the data given based on the autocorrelation analysis, it is evidenced that there is a relationship between the AR type 1, AR type 2, SMA type 12, type 24, and type 36. As noted from these aspects the data gives how the factors or elements are affecting the company that is Apple computer company. For this case, since there are two spikes as observed in the ACF 1 there is an estimated AR2. Thus, from the correlation analysis much would be noted that there is one seasonal spike which is in the ACF at about position 36 or 3. With the ACF at position 36 or 3 then the estimated correlation aspect is SMA 3. In addition, from the observations of the data
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