Calculate the expected value, the variance, and the standard deviation of the given random variable X.

Forty-five darts are thrown at a dartboard. The probability of hitting a bull's-eye is 0.3. Let X be the number of bull's-eyes hit.

Please round your answers to two decimal places, if necessary.
$\mu = E ( X ) =$ __________
$\sigma ^ { 2 } =$ __________
$\sigma =$ __________

Question

Calculate the expected value, the variance, and the standard deviation of the given random variable X.
​
Forty-five darts are thrown at a dartboard. The probability of hitting a bull's-eye is 0.3. Let X be the number of bull's-eyes hit.
​
Please round your answers to two decimal places, if necessary.
​ $\mu = E ( X ) =$ __________
​ $\sigma ^ { 2 } =$ __________
​ $\sigma =$ __________

Quizplus · Accepted Answer

The Answer of Calculate the expected value, the variance, and the standard deviation of the given random variable X.
​
Forty-five darts are thrown at a dartboard. The probability of hitting a bull's-eye is 0.3. Let X be the number of bull's-eyes hit.
​
Please round your answers to two decimal places, if necessary.
​ $\mu = E ( X ) =$ __________
​ $\sigma ^ { 2 } =$ __________
​ $\sigma =$ __________

Calculate the Expected Value, the Variance, and the Standard Deviation μ=E(X)=\mu = E ( X ) =μ=E(X)=

Calculate the Expected Value, the Variance, and the Standard Deviation $\mu = E ( X ) =$