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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Definitions:

Financial Performance Measurement

The process of evaluating how well a company or organization manages its income and expenses to maximize profit and ensure sustainability.

Financial Results

The outcomes of a company's operations and activities in terms of profits, losses, revenue, and expenses over a specific period.

Measure of Efficiency

Metrics and criteria used to evaluate how effectively and economically resources are utilized to achieve desired outcomes.

Design Thinking

A human-centered approach to innovation that integrates the needs of people, the possibilities of technology, and the requirements for business success.