Instruction 5.1
The following table contains the probability distribution for X = the number of retransmissions necessary to successfully transmit a 1024K data package through a double satellite media.
$$\begin{array} { | c | c | c | c | c | }
\hline X & 0 & 1 & 2 & 3 \
\hline p ( X ) & 0.35 & 0.35 & 0.25 & 0.05 \
\hline
\end{array}$$
-Referring to Instruction 5.1,the variance for the number of retransmissions is ______.

Question

Instruction 5.1
The following table contains the probability distribution for X = the number of retransmissions necessary to successfully transmit a 1024K data package through a double satellite media.
 $$\begin{array} { | c | c | c | c | c | } 
\hline X & 0 & 1 & 2 & 3 \
\hline p ( X ) & 0.35 & 0.35 & 0.25 & 0.05 \
\hline
\end{array}$$
-Referring to Instruction 5.1,the variance for the number of retransmissions is ______.

Quizplus · Accepted Answer

The Answer of Instruction 5.1
The following table contains the probability distribution for X = the number of retransmissions necessary to successfully transmit a 1024K data package through a double satellite media.
 $$\begin{array} { | c | c | c | c | c | } 
\hline X & 0 & 1 & 2 & 3 \
\hline p ( X ) & 0.35 & 0.35 & 0.25 & 0.05 \
\hline
\end{array}$$
-Referring to Instruction 5.1,the variance for the number of retransmissions is ______.

Instruction 5 X0123p(X)0.350.350.250.05\begin{array} { | c | c | c | c | c | } \hline X & 0 & 1 & 2 & 3 \\\hline p ( X ) & 0.35 & 0.35 & 0.25 & 0.05 \\\hline\end{array}Xp(X)​00.35​10.35​20.25​30.05​​

Instruction 5 $\begin{array} { | c | c | c | c | c | } \hline X & 0 & 1 & 2 & 3 \\\hline p ( X ) & 0.35 & 0.35 & 0.25 & 0.05 \\\hline\end{array}$