A Manager at a Local Company Asked His Employees How

question 66

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

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Definitions:

Coastal Fish Farms

Aquaculture operations located near the coastlines where fish are raised in controlled environments for commercial purposes.

Alien Species

Alien species, also known as invasive species, are organisms that are introduced to a new habitat where they are not native, often causing harm to the environment, economy, or human health.

Great Lakes

A group of five large, interconnected freshwater lakes located on the border between the United States and Canada, significant for their water resources, biodiversity, and transportation routes.

Thermal Pollution

The degradation of water quality by any process that changes ambient water temperature, typically due to industrial activities like power plants.