The Following Table Presents the Probability Distribution of the Number $\sigma$

question 23

Multiple Choice

The following table presents the probability distribution of the number of vacations taken last year for a randomly chosen family. Compute the standard deviation $\sigma$ .
$\begin{array}{c|ccccc}x & 0 & 1 & 2 & 3 & 4 \\\hline P(x) & 0.06 & 0.67 & 0.18 & 0.07 & 0.02\end{array}$

• A) 1.38
• B) 1.32
• C) 0.77
• D) 0.60

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Definitions:

Equilibrium

A state in which all acting influences are balanced or canceled by equal opposing forces, resulting in a stable system.

Reactants

Ingredients that are present from the start in a chemical reaction, getting used up as they generate the outcome products.

Equilibrium

The state in which both reactants and products are present in concentrations which have no further tendency to change with time, usually in a closed system.

Product

The result of multiplying two or more numbers together or the substances formed at the end of a chemical reaction.