A farmer’s yearly yield is based on the amount of rainfall received in a year and average temperature during the year. A series of observations over the past 15 years was obtained, and the model yielded the following results:

Does it show any positive autocorrelation in the error terms at 5% significance level?

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Yield, = 0.767 + 0.3543 X rainfall,+ 0.7294 × tempt R² = 0.873, d = 0.726