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Chapter 4: Q 91. (page 260)

Can changing diet reduce high blood pressure? Vegetarian diets and low-salt diets are both promising. Men with high blood pressure are assigned at random to four diets: (1) normal diet with unrestricted salt; (2) vegetarian with unrestricted salt; (3) normal with restricted salt; and (4) vegetarian with restricted salt. This experiment has

(a) one factor, the type of diet.

(b) two factors, high blood pressure, and type of diet.

(c) two factors, a normal/vegetarian diet and unrestricted/ restricted salt.

(d) three factors, men, high blood pressure, and type of diet.

(e) four factors, the four diets being compared.

Short Answer

Expert verified

The correct option is (c).

Step by step solution

01

Given information

Both vegetarian and low-salt diets show promise. Four diets are randomly assigned to men with high blood pressure.

02

Concept

Individuals are purposely subjected to a treatment in order to measure their responses in an experiment.

03

Explanation

The researcher wants to determine if a high-carbohydrate diet can lower blood pressure. The four diet categories are:

1. A normal diet with no salt restrictions.

2. A vegetarian diet with no salt restrictions.

3. A healthy diet with a low salt intake.

4. A salt-restricted vegetarian diet.

The first thing that we note is whether we eat a typical or vegetarian diet. We should also mention that the second aspect is the choice of restricted or unrestricted salt. A typical or vegetarian diet, as well as an unrestricted or restricted salt intake, are two aspects to consider. As a result, option (c) is the proper choice.

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