A Manager at a Local Company Asked His Employees How

Multiple Choice

A manager at a local company asked his employees how many times they had given blood in the last year. Theresults of the survey are given below. The random variable x represents the number of times a person gaveblood and P(x) represents the probability of selecting an employee who had given blood that percent of thetime. What is the standard deviation for the number of times a person gave blood based on this survey? $$\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & 0 & 1 & 2 & 3 & 4 & 5 & 6 \\\hline P ( x ) & 0.30 & 0.25 & 0.20 & 0.12 & 0.07 & 0.04 & 0.02 \\\hline\end{array}$$

A) 1.54
B) 1.82
C) 1.16
D) 2.23