weight & height for female ul students
Post on 01-Jan-2016
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Under usual assumptions, the conditional distributions of Y at each level of Height, X, all have the same variance.
Weight & Height for Female UL Students
Weight Y
x1= 60
x3= 68
f(Y)
Height X
x2= 64 .
Conditional distribution of Y|X = 68
Marginal distribution of Y
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Regression line
Y 1 6 3Y 1 3 5Y 1 0 6
MY = 142
sY = 40
sY|X = 36
Under usual assumptions, the conditional distributions of Y at each level of Height, X, all have the same variance.
Predicting GPA from ACT
GPA Y
x1= 12
x3= 28
f(Y)
ACT X
x2= 20 .
Conditional distribution of Y|X = 28
Marginal distribution of Y
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Regression line
.Y 3 3 6 8 .Y 2 6 .Y 1832
MY = 2.6
sY = .8
sY|X = .64
Heteroscedastic pattern of errors.
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yt
0The scattered points spread out quite unequally
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