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Nov 15,2022
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yield
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determine
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by the total sum
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of
as
B Bix g
Var ypg
S
100
is
IFI
l d
To
of Y
confidence
interval for
t.IT
02
Gy
mean
prediction interval for
at
X
Xp
an
Y at Exp
individual
new
value
is
X outside the sample range
É
FIjj
We should not make estimation
errors
value of
IgF
t.FI
large
Var y
o
Y
10011 d
Vary
of
of
predictionForvalues
X which
can
lead to
of
Er
9
A
2700
202
n
company's sales
Bo
revenue
banks
charges
Interpolate the estimate
of
Bo
of the line
Answer There
a
sales
is
the y
intercept
practical interpretation since
no
revenue
of
0 is
a
nonsensical value
Ex 2 The least
squares model provides very good
estimates of y for values of X far outside the
contained in the sample
range of x
A True
B False
I
Don't estimate outside
range of X