Find (by inspection) the expected value and standard deviation of the random variable with the following density function: $f ( x ) = \frac { 7 } { \sqrt { 2 \pi } } e ^ { - 49 / 2 ( x - 3.9 ) ^ { 2 } }$ Enter your answer as just two numbers (a real number to one decimal place followed by a reduced fraction) separated by a comma, the first representing E(X) and the second representing $\sqrt { \operatorname { Var } ( X ) }$ .

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The Answer of Find (by inspection) the expected value and standard deviation of the random variable with the following density function: $f ( x ) = \frac { 7 } { \sqrt { 2 \pi } } e ^ { - 49 / 2 ( x - 3.9 ) ^ { 2 } }$ Enter your answer as just two numbers (a real number to one decimal place followed by a reduced fraction) separated by a comma, the first representing E(X) and the second representing $\sqrt { \operatorname { Var } ( X ) }$ .

Find (By Inspection) the Expected Value and Standard Deviation of the Random