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Suppose the following are the seasonal indices for the first three quarters of t

ID: 3244186 • Letter: S

Question

Suppose the following are the seasonal indices for the first three quarters of the year for a quarterly series: Quarter Seasonal Index Q1 74.1 Q2 84.2 Q3 105.4 Remember that the seasonal indices should average 100 so you should be able to infer the seasonal index for Q4. Furthermore, suppose that the estimated coefficients from a regression of the depersonalized series on Time are given below: Coefficients Intercept 2, 404 Time 64.3 What is the forecast for period 98, if period 98 is a Q3? (please round your answer to 1 decimal place) __________

Explanation / Answer

Given the period is 98

The estimated coefficient from a regression of the deseasonalized series of Time is

Forecast = 2404 + 64.3 * 98 = 8705.4

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