Short Answer
TABLE 16-13
Given below is the monthly time-series data for U.S. retail sales of building materials over a specific year.
The results of the linear trend, quadratic trend, exponential trend, first-order autoregressive, second-order autoregressive and third-order autoregressive model are presented below in which the coded month for the first month is 0:
-Referring to Table 16-13, what is the value of the t test statistic for testing the significance of the quadratic term in the quadratic-trend model?
Correct Answer:

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Correct Answer:
Verified
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