The Following Table Gives the Number of Pets Owned for a Population

The following table gives the number of pets owned for a population of four families. $\begin{array} { | l | c | c | c | c | } \hline \text { Family } & \text { A } & \text { B } & \text { C } & \text { D } \\\hline \text { Number of pets owned } & 2 & 1 & 4 & 3 \\\hline\end{array}$ Samples of size 2 will be drawn at random from the population. Use your answers to the previous question to calculate the mean and the standard deviation of the sampling distribution of the sample means.