Consider the probability distribution shown here. $\begin{array}{l|lll}
\hline x & 7 & 9 & 11 \
\hline p(x) & \frac{1}{3} & \frac{1}{3} & \frac{1}{3} \
\hline
\end{array}$

Let $\bar { x }$ be the sample mean for random samples of $n = 2$ measurements from this distribution. Find $E ( x )$ and $E ( \bar { x } )$.

Question

Consider the probability distribution shown here. $\begin{array}{l|lll}
\hline x & 7 & 9 & 11 \
\hline p(x) & \frac{1}{3} & \frac{1}{3} & \frac{1}{3} \
\hline
\end{array}$

Let $\bar { x }$ be the sample mean for random samples of $n = 2$ measurements from this distribution. Find $E ( x )$ and $E ( \bar { x } )$.

Quizplus · Accepted Answer

The Answer of Consider the probability distribution shown here. $\begin{array}{l|lll}
\hline x & 7 & 9 & 11 \
\hline p(x) & \frac{1}{3} & \frac{1}{3} & \frac{1}{3} \
\hline
\end{array}$

Let $\bar { x }$ be the sample mean for random samples of $n = 2$ measurements from this distribution. Find $E ( x )$ and $E ( \bar { x } )$.

Consider the Probability Distribution Shown Here x7911p(x)131313\begin{array}{l|lll}\hline x & 7 & 9 & 11 \\\hline p(x) & \frac{1}{3} & \frac{1}{3} & \frac{1}{3} \\\hline\end{array}xp(x)​731​​931​​1131​​​

Consider the Probability Distribution Shown Here $\begin{array}{l|lll}\hline x & 7 & 9 & 11 \\\hline p(x) & \frac{1}{3} & \frac{1}{3} & \frac{1}{3} \\\hline\end{array}$