Scientists conduct a study in which 100 adults with chronic diarrhea are divided into 2 groups of 50 people.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 the their bowel habits.This is an example of a(n)____ study.
A)double-blind
B)hypothetical
C)introspective
D)uncontrolled

Question

Quizplus · Accepted Answer

This study is double-blind because both the participants and the researchers are unaware of which group is receiving the yogurt with bacteria and which group is receiving the bacteria-free yogurt. This helps to eliminate potential biases in the study and ensures that the results are more reliable. The other options, such as hypothetical, introspective, and uncontrolled, do not accurately describe the type of study being conducted.

Scientists Conduct a Study in Which 100 Adults with Chronic