DrPrutherow Believes That People Who Are Under Stress Will Develop

question 227

Multiple Choice

Dr.Prutherow believes that people who are under stress will develop more colds than people who are not under stress.When he randomly selects 10 participants and exposes them to high levels of stress,he finds that 9 of the participants develop colds.Based on these results he concludes that stress causes an increase in colds.Dr.Prutherow's reasoning may be flawed because in this study

• A) there was no dependent variable in his study.
• B) there was no control group for comparison.
• C) he didn't formulate a hypothesis before he collected his data.
• D) he didn't measure the independent variable when the study ended.

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Definitions:

Two Independent

Refers to having two variables in an experiment that are manipulated or changed independently of each other.

Factorial ANOVA

A statistical test used to evaluate the effects of two or more independent variables on a single dependent variable, allowing for the examination of interactions between factors.

Independent Variable

A variable that is manipulated to observe its effect on a dependent variable in an experiment.

Outcome Variable

The variable that is the result of an experiment or study, often measured to assess the effect of a treatment.