Standard Deviation Observations Linear Relation… | ExamDuo
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Dispersion and Variance
Medium
Standard Deviation Observations Linear Relation
Consider three observations
a
,
b
and
c
, such that
b
=
a
+
c
. If the standard deviation of
a
+
2
,
b
+
2
,
c
+
2
is
d
, then which of the following is true?
Ask about this question
SELECT ONE OPTION
A
b
2
=
3
(
a
2
+
c
2
)
+
9
d
2
B
b
2
=
a
2
+
c
2
+
3
d
2
C
b
2
=
3
(
a
2
+
c
2
+
d
2
)
D
b
2
=
3
(
a
2
+
c
2
)
−
9
d
2
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