Consider a time series with 15 quarterly sales observations.Using the quadratic trend model,the following partial computer output was obtained. State the two-sided null and alternative hypotheses to test the significance of the t² term.

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The Answer of Consider a time series with 15 quarterly sales observations.Using the quadratic trend model,the following partial computer output was obtained. State the two-sided null and alternative hypotheses to test the significance of the t² term.

Consider a Time Series with 15 Quarterly Sales Observations