Let X represent the number of computers in an Australian household, for those that own a computer. $$\begin{array} { | l | r | r | r | r | r | }
\hline x & 1 & 2 & 3 & 4 & 5 \
\hline p ( x ) & 0.25 & 0.33 & 0.17 & 0.15 & 0.10 \
\hline
\end{array}$$ a. Find and interpret the expected number of computers in a randomly selected Australian household.
b. Find the variance of the number of computers in a randomly selected Australian household.

Question

Let X represent the number of computers in an Australian household, for those that own a computer. $$\begin{array} { | l | r | r | r | r | r | } 
\hline x & 1 & 2 & 3 & 4 & 5 \
\hline p ( x ) & 0.25 & 0.33 & 0.17 & 0.15 & 0.10 \
\hline
\end{array}$$ a. Find and interpret the expected number of computers in a randomly selected Australian household.
b. Find the variance of the number of computers in a randomly selected Australian household.

Quizplus · Accepted Answer

The Answer of Let X represent the number of computers in an Australian household, for those that own a computer. $$\begin{array} { | l | r | r | r | r | r | } 
\hline x & 1 & 2 & 3 & 4 & 5 \
\hline p ( x ) & 0.25 & 0.33 & 0.17 & 0.15 & 0.10 \
\hline
\end{array}$$ a. Find and interpret the expected number of computers in a randomly selected Australian household.
b. Find the variance of the number of computers in a randomly selected Australian household.

Let X Represent the Number of Computers in an Australian x12345p(x)0.250.330.170.150.10\begin{array} { | l | r | r | r | r | r | } \hline x & 1 & 2 & 3 & 4 & 5 \\\hline p ( x ) & 0.25 & 0.33 & 0.17 & 0.15 & 0.10 \\\hline\end{array}xp(x)​10.25​20.33​30.17​40.15​50.10​​

Let X Represent the Number of Computers in an Australian $\begin{array} { | l | r | r | r | r | r | } \hline x & 1 & 2 & 3 & 4 & 5 \\\hline p ( x ) & 0.25 & 0.33 & 0.17 & 0.15 & 0.10 \\\hline\end{array}$