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In the law firm Tybo and Associates, there are six partners. Listed is the number of cases each partner actually tried in court last month.

 Partner  Number of Cases  Ruud 3 Wu 6 Sass 3 Flores 3 Wilhelms 0 Schueller 1\begin{array}{|lc|} \hline \text { Partner } & \text { Number of Cases } \\ \hline \text { Ruud } & 3 \\ \text { Wu } & 6 \\ \text { Sass } & 3 \\ \text { Flores } & 3 \\ \text { Wilhelms } & 0 \\ \text { Schueller } & 1 \end{array}

a. How many different samples of size 3 are possible? b. List all possible samples of size 3 , and compute the mean number of cases in each sample. c. Compare the mean of the distribution of sample means to the population mean. d. On a chart similar to Chart 828-2, compare the dispersion in the population with that of the sample means.

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