Download Manual supplement for MLwiN Version 2.26

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Click Fill grid
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Click Predict
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Click Plot grid
In the Customised prediction plot window
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Select Y: median.pred
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Select X: standlrt.pred
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Select Grouped by: avslrt.pred
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Click Apply
Which produces:
The graph shows how the probability of passing increases as pupil intake
ability increases, with the increase being stronger for those in high ability
peer groups. We now explore the differences between low and high ability
peer groups as functions of standlrt and assess if and where those differences
are significant. In the Customised predictions window
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Select Differences; from variable: avslrt Reference value: −0.5
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Press the Predict button
In the Customised prediction plots window
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Select 95% confidence interval:
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Click Apply
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