The marketing department of an electronics manufacturer has done research on the number of television sets owned by families in a large town. The probability model for the number of sets owned by a randomly chosen family is given below. What is the mean number of sets per family? $$\begin{array} { l c c c c }
\text { Number of } & 0 & 1 & 2 & 3 \
\text { sets } & & & & \
\text { Probability } & 0.04 & 0.34 & 0.47 & 0.15
\end{array}$$
A) 0.96
B) 1.5
C) 1.77
D) 1.73

Question

The marketing department of an electronics manufacturer has done research on the number of television sets owned by families in a large town. The probability model for the number of sets owned by a randomly chosen family is given below. What is the mean number of sets per family? $$\begin{array} { l c c c c } 
\text { Number of } & 0 & 1 & 2 & 3 \
\text { sets } & & & & \
\text { Probability } & 0.04 & 0.34 & 0.47 & 0.15
\end{array}$$
A) 0.96
B) 1.5
C) 1.77
D) 1.73

Quizplus · Accepted Answer

To find the mean number of sets per family, multiply each number of sets by its corresponding probability and sum the results: $0(0.04) + 1(0.34) + 2(0.47) + 3(0.15) = 0 + 0.34 + 0.94 + 0.45 = 1.73$.

The Marketing Department of an Electronics Manufacturer Has Done Research