Question

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1. mrs. ana believes that a diet high in fiber will help her chickens lay more eggs. therefore, she provides half her chickens with feed that is fiber - rich, and the other half with the standard chicken feed.

a. what is the independent variable?

b. what is the dependent variable?

c. who comprises the experimental group?

d. who comprises the control group?

1. what is the difference between an independent and dependent variable?

Explanation:

In an experiment, the independent variable is what the researcher manipulates. The dependent variable is what is measured and affected by the independent variable. The experimental group receives the treatment (in this case, the fiber - rich feed), and the control group is the comparison group (receives standard feed). An independent variable is the cause, and the dependent variable is the effect.

a.

The type of feed (fiber - rich or standard) is what Mrs. Ana is changing, so it is the independent variable.

b.

The number of eggs laid by the chickens is what is being measured and is expected to be affected by the type of feed, so it is the dependent variable.

c.

The chickens that are provided with the fiber - rich feed are the ones receiving the treatment being tested, so they comprise the experimental group.

d.

The chickens that are provided with the standard chicken feed are used for comparison, so they comprise the control group.

8.

An independent variable is the variable that the experimenter controls or manipulates. It is the presumed cause. A dependent variable is the variable that is measured or observed and is affected by the independent variable. It is the presumed effect.

Answer:

a. The type of feed.
b. The number of eggs laid.
c. Chickens with fiber - rich feed.
d. Chickens with standard chicken feed.

1. An independent variable is manipulated by the experimenter (presumed cause), a dependent variable is measured and affected by the independent variable (presumed effect).