If X and Y Are Independent Variables with V(X)= 23

question 241

True/False

If X and Y are independent variables with V(X)= 23.48 and V(Y)= 36.52,then the standard deviation of W = X + Y is σ_w = 7.746.

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Definitions:

Polygraph Examination

A test that measures physiological responses, such as blood pressure, pulse, and skin conductivity, to determine whether a person is telling the truth.

Physiological Arousal

Refers to physical changes in the body, such as increased heart rate or adrenaline release, in response to stimuli or activities.

Test Performance

refers to how well an individual performs on standardized tests or examinations, often used as a measure of competence or achievement.

Polygraph

A machine, commonly used in attempts to detect lies, that measures several of the physiological responses accompanying emotion (such as perspiration and cardiovascular and breathing changes).