High School

A certain herb is said to be effective in

treating depression. A group of researchers

randomly assigns 200 patients with major

depression to either take the herb or a

dummy pill that looked and tasted the same.

This is an example of

A An Obsenational Study

B. Contro ed Experiment

C. A survey

A certain herb is said to be effective in treating depression A group of researchers randomly assigns 200 patients with major depression to either take

Answer :

The event is a controlled experiment. Hence, option (B) is correct.

What is algebra?

Algebra is a study of mathematical expressions, in which numbers and quantities are represented in formulas and equations by letters and other universal symbols.

Given that,

Total number of patients = 200

The herb and dummy pill that looks and tastes same gives to patient for treating depression,

The result of the experiment can be controlled.

So, the given condition shows that the event is a controlled experiment.

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Answer:

B: a controlled experiment ( in acellus )

Step-by-step explanation:

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