Fit a cubic trend function to the data in Example 2. The
Chapter 6, Problem 3E(choose chapter or problem)
Fit a cubic trend function to the data in Example 2. The orthogonal cubic polynomial is Reference Example 2:The simplest and most common use of trend analysis occurs when the points can be adjusted so that they are evenly spaced and sum to zero. Fit a quadratic trend function to the data
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