Fitting the model using REML in the Standard Least Squares personality lets you view the variation in intercepts and slopes (Standard Least Squares Regression). Note that the slopes do not have much variability, but the intercepts have quite a bit. The intercept and slope might be negatively correlated; varieties with lower intercepts seem to have higher slopes.
Standard Least Squares Regression
1.
Open the Wheat.jmp sample data table.
2.
Select Analyze > Fit Model.
3.
Select Yield and click Y.
4.
Select Mixed Model from the Personality list. Alternatively, you can select the Mixed Model personality first, and then click Y to add Yield.
5.
Select Moisture and click Add on the Fixed Effects tab.
Completed Fit Model Launch Window Showing Fixed Effects
6.
Select the Random Effects tab.
7.
Select Moisture and click Add.
8.
Select Variety from the Select Columns list, select Moisture from the Random Effects tab, and then click Nest Random Coefficients.
Completed Fit Model Launch Window Showing Random Effects Tab
9.
Click Run.
The Fit Mixed report is shown in Fit Mixed Report. Note that some of the constituent reports are closed because of space considerations. The Actual by Predicted plot shows no discrepancy in terms of model fit and underlying assumptions.
Yield = 33.43 + 0.66 * Moisture
Fit Mixed Report
Yield = 33.43 - 2.28 + 0.66 * Moisture - 0.07 * Moisture = 31.15 + 0.59 * Moisture
Random Coefficients Report