Exhibit 20

question 65

Multiple Choice

Exhibit 20.11.A wine magazine wants to know if chefs can tell the difference between duck liver pate and wet dog food.Eighteen chefs were asked to rate both the pate and dog food on a scale from 1 to 5,with 1 corresponding to "inedible" and 5 to "very tasty".The results are shown in the following table. Refer to Exhibit 20.11.To determine if there are differences in preferences between pate and dog food using the sign test,the competing hypotheses are:

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Definitions:

Pacemaker

A medical device that regulates the heartbeat by sending electrical pulses to stimulate the heart when it is beating too slowly or irregularly.

Inhalation

The act of drawing air or other substances into the lungs, a critical component of the respiratory process.

Gas Exchange

The process by which organisms exchange gases (such as oxygen and carbon dioxide) with their environment, crucial for respiration and photosynthesis.

Amphibians

Amphibians are a class of cold-blooded vertebrates that includes frogs, toads, salamanders, and newts, characterized by their life cycle stages both in water and on land.