Question

Scientists conduct a study in which 100 adults with chronic diarrhea are divided into 2 groups with 50 people per group. One group is given a supply of yogurt that contains a certain kind of bacteria, and the other group is given yogurt that is bacteria-free. The study's participants and researchers do not know which group of subjects has the bacteria in the yogurt and which group does not. The scientists instruct the participants to eat the entire 8 ounces of yogurt once a day for a month and record their bowel habits. This is an example of a(n) ________ study.

a. introspective
b. hypothetical
c. uncontrolled
d. double-blind

Answer 1

double-blind study

Step-by-step explanation:

Double - blind study -

It is the type of experiment , where the participants and the people performing the experiment , don't have any idea about the treatment they are given , is known as double - blind study .

This method is important to perform a very bias study and uniformly perform the experiment.

Hence, from the given question,

The example shown in the question, is about double - blind study.