Asked by Kallol Hazarika on Jul 07, 2024
Verified
Dr.Prutherow believes that people who are under stress will develop more colds than people who are not under stress.When he randomly selected ten participants and exposed them to high levels of stress,he found that nine of the participants developed colds.What critical piece is missing from Dr.Prutherow's study
A) a dependent variable
B) a testable hypothesis
C) a group without stress
D) a group without colds
Testable Hypothesis
A statement about the world that can be verified or discredited through empirical observation or experimentation.
Dependent Variable
The variable in an experiment that is expected to change as a result of manipulations made to the independent variable.
- Ascertain the purpose and value of control groups in the context of experimental methodologies.
- Understand the importance of external variables in experimental studies and the methods to manage their impact.
Verified Answer
SJ
Salman JadwetJul 07, 2024
Final Answer :
C
Explanation :
Dr. Prutherow's study lacks a control group that is not exposed to stress. Without a group without stress, it is impossible to determine if the colds were caused by stress or other factors. Establishing a group without stress would allow for comparison and help to determine whether stress has a significant impact on cold development.
Learning Objectives
- Ascertain the purpose and value of control groups in the context of experimental methodologies.
- Understand the importance of external variables in experimental studies and the methods to manage their impact.
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