Var(aX + BY)=
A) $a ^ { 2 } \sigma \stackrel { 2 } { X } + b ^ { 2 } \sigma \stackrel { 2 } { Y }$

question 16

Multiple Choice

var(aX + bY) =

• A) \(a ^ { 2 } \sigma \stackrel { 2 } { X } + b ^ { 2 } \sigma \stackrel { 2 } { Y }\)
• B) \(a^{2} \sigma_{\mathrm{X}}^{2}+2 a b \sigma_{X Y}+b^{2} \sigma_{Y}^{2} .\)
• C) \(\sigma _ { X Y } + \mu _ { X } { } ^ { \mu } Y ^ { * }\)
• D) \(a \sigma _ { \mathrm { X } } ^ { 2 } + b \sigma _ { \mathrm { Y } } ^ { 2 }\)

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Definitions:

Defense Mechanism

Psychological strategies used unconsciously by individuals to protect themselves from anxiety and internal conflicts.

Psychoanalyst

A therapist who employs psychoanalysis, a therapeutic approach developed by Freud that focuses on exploring unconscious motivations and conflicts.

Regression

A psychological defense mechanism where an individual reverts to an earlier stage of development in response to stress.

Bed-Wetting

Involuntary urination while asleep after the age at which bladder control usually occurs, typically seen in children.