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:

Sarcomere Contraction

The process by which muscle fibers contract, shortening the sarcomere, the basic unit of muscle fiber, thereby generating force.

Glycerin

A simple polyol compound often used in pharmaceutical formulations, foods, and personal care products for its moisturizing and emollient properties.

Skeletal Muscle Fibers

Long, cylindrical cells that make up skeletal muscles, responsible for voluntary body movements.

A Band

The dark area in the sarcomere of a muscle fiber, consisting of thick myosin filaments alongside partially overlapping thin actin filaments.