The Number of Customers in a Line at a Supermarket

question 36

Multiple Choice

The number of customers in a line at a supermarket express checkout counter is a random variable with the following probability distribution.

$\begin{array} { c | c | c | c | c | c | c } \boldsymbol { x } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline \boldsymbol { P } ( \boldsymbol { x } ) & 0.10 & 0.25 & 0.30 & 0.18 & 0.07 & 0.10\end{array}$

Compute the mean $\mu _ { x ^ { * } }$

• A) 0.36
• B) 2.17
• C) 0.17
• D) 0.43

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Definitions:

Chief Justice Roger Taney

The fifth Chief Justice of the United States, known for his controversial decision in the Dred Scott v. Sandford case, which stated that African Americans could not be American citizens.

Fugitive Slave Act

Legislation passed in 1850 in the United States that required the return of escaped slaves to their owners, regardless of the state where they were found.

Wilmot Proviso

The Wilmot Proviso was a proposed amendment to a military appropriations bill in 1846, seeking to ban slavery in territories acquired from Mexico, igniting a heated debate over slavery’s expansion in the United States.

Kansas-Nebraska Act

A 1854 U.S. law that allowed territories of Kansas and Nebraska to decide on the legality of slavery through popular sovereignty, exacerbating sectional tensions.