Application of Skills Directions

question 14

Multiple Choice

Application of Skills Directions:
Read the following excerpt adapted from Dianne Hales' textbook, An Invitation to Health: Choosing to Change (p. 319) . Apply the knowledge you have gained from Chapter 14 to select the best answer for the following questions.
How Infections Spread
​¹ Food and water are two major means of transmission for infectious disease. ²Every year foodborne illnesses strike millions of Americans and sometimes even cause death. ³Bacteria account for two-thirds of foodborne infections, and thousands of suspected cases of infection with Escherichia coli bacteria in undercooked food have been reported. ⁴Every year as many as 4 million Americans have a bout with Salmonella bacteria because of tainted poultry sold in the United States. ⁵Waterborne diseases, such as typhoid fever and cholera, are widespread in less developed areas of the world, but they have been rare in the United States, although outbreaks caused by inadequate water purification have occurred.
What is the subject in sentence 1?​

• A) ​Food and water
• B) ​two
• C) ​major means
• D) ​transmission

---

Definitions:

Chi-Square Distribution

A statistical distribution that is used to describe the distribution of a sum of the squares of k independent standard normal random variables, useful in hypothesis testing and constructing confidence intervals.

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or to a system without violating any constraints.

Left-Tailed Area

Refers to the area under the probability distribution curve to the left of a specified value, often used in hypothesis testing to determine significance.

Multinomial Experiment

An experiment or trial that results in outcomes classified into more than two categories, where the probabilities of outcomes are fixed.