The following table shows part of the probability distribution for a random variable x.

$$\begin{array} { r r }
\mathbf { x } & \mathbf { f x } ) \
0 & 0.2 \
1 & ? \
2 & 0.15 \
3 & ? \
4 & 0.15
\end{array}$$
a. The mean of the above distribution is known to be 1.8 i.e., Ex) = 1.8). Determine f1) and f3).
b. Compute the variance and the standard deviation for the above probability distribution.

Question

The following table shows part of the probability distribution for a random variable x.

$$\begin{array} { r r } 
\mathbf { x } & \mathbf { f x } ) \
0 & 0.2 \
1 & ? \
2 & 0.15 \
3 & ? \
4 & 0.15
\end{array}$$
a. The mean of the above distribution is known to be 1.8 i.e., Ex) = 1.8). Determine f1) and f3).
b. Compute the variance and the standard deviation for the above probability distribution.

Quizplus · Accepted Answer

The Answer of The following table shows part of the probability distribution for a random variable x.

$$\begin{array} { r r } 
\mathbf { x } & \mathbf { f x } ) \
0 & 0.2 \
1 & ? \
2 & 0.15 \
3 & ? \
4 & 0.15
\end{array}$$
a. The mean of the above distribution is known to be 1.8 i.e., Ex) = 1.8). Determine f1) and f3).
b. Compute the variance and the standard deviation for the above probability distribution.

The Following Table Shows Part of the Probability Distribution for a Random