The Random Variable X Represents the Number of Computers That

question 3

Multiple Choice

The random variable x represents the number of computers that families have along with the correspondingprobabilities. Find the mean and standard deviation for the random variable x. $$\begin{array} { c | c } \mathrm { x } & \mathrm { P } ( \mathrm { x } ) \\\hline 0 & 0.49 \\1 & 0.05 \\2 & 0.32 \\3 & 0.07 \\4 & 0.07\end{array}$$

• A) mean: 1.18; standard deviation: 1.30
• B) mean: 1.39; standard deviation: 0.64
• C) mean: 1.39; standard deviation: 0.80
• D) mean: 1.18; standard deviation: 0.64

---

Definitions:

Cash Account

An account that records cash transactions, including both incoming and outgoing cash flows, essential for effective financial management.

Raw Materials

The basic materials from which products are made, usually processed in several stages in the production cycle.

Direct Labor Cost

The total cost of all labor directly involved in the production of goods or services.

Standard Cost System

An accounting framework where standard costs are used for cost control and decision making, typically involving the setting of predetermined costs for products and services.