Читать книгу Introduction to Linear Regression Analysis - Douglas C. Montgomery - Страница 28
Example 2.2 The Rocket Propellant Data
ОглавлениеTo estimate σ2 for the rocket propellant data in Example 2.1, first find
From Eq. (2.18) the residual sum of squares is
Therefore, the estimate of σ2 is computed from Eq. (2.19) as
Remember that this estimate of σ2 is model dependent. Note that this differs slightly from the value given in the Minitab output (Table 2.3) because of rounding.
