The Number of Customers in a Line at a Supermarket

question 48

Multiple Choice

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

$\begin{array}{l}\begin{array} { c | c | c | c | c | c | c } \boldsymbol { x } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline \boldsymbol { P } ( \boldsymbol { x } ) & 0.11 & 0.22 & 0.31 & 0.16 & 0.09 & 0.11\end{array}\\\\\text { Compute the standard deviation } \sigma _ { x } \text {. }\end{array}$

• A) 2.12
• B) 2.23
• C) 4.48
• D) 1.46

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Wavy Lines

Lines that exhibit a series of smooth, curving shapes, often used in art and design to suggest movement or variability.

Temporal Lobes

The temporal lobes are regions of the brain located on each side of the brain, responsible for processing auditory information and encoding memory.

Neurons

are specialized cells in the nervous system that transmit information to other nerve cells, muscle, or gland cells.

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The verbal expression of or the ability to express thoughts and feelings by articulating sounds.