Given Independent Random Variables with Means and Standard Deviations as Shown,find

question 158

Multiple Choice

Given independent random variables with means and standard deviations as shown,find the mean and standard deviation of the variable $$Y _ { 1 } + Y _ { 2 }$$ $$\begin{array} { c | c c } & \text { Mean } & \text { SD } \\\hline \mathrm { X } & 150 & 12 \\\mathrm { Y } & 200 & 18\end{array}$$

• A)? = 350,? = 21.63
• B)? = 350,? = 30
• C)? = 400,? = 25.46
• D)? = 400,? = 36
• E)? = 400,? = 6.00

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Physiological Responses

Automatic reactions of the body to internal or external events or stimuli.

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Reactions exhibited by individuals in response to external or internal stimuli.

Stress

A physical or psychological response to internal or external pressures, challenges, or threats, often characterized by feelings of tension, anxiousness, or overwhelm.

Pressure

A psychological state characterized by the perception of demands or stressors that are viewed as taxing or exceeding one's resources or abilities.