DrCrandall Wants to Use the Scientific Method to Test Whether

question 322

Multiple Choice

Dr.Crandall wants to use the scientific method to test whether caffeine improves cardiovascular endurance in male athletes.What is the first thing that he should do?

• A) Observe male athletes doing cardiovascular workouts after having consumed caffeine or not.
• B) Develop hypotheses about caffeine consumption and cardiovascular endurance.
• C) Randomly give half of the male athlete's caffeine and the other half no caffeine and then test their cardiovascular endurance.
• D) Build a theory about caffeine's effect on the cardiovascular system.

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Definitions:

Multiple Comparison Procedure

A statistical method used to evaluate differences among group means after an ANOVA, controlling for the error rate.

Significantly Different

A statistical term used to describe a result that is unlikely to have occurred by chance alone, as determined by a predetermined significance level.

ANOVA

Short for Analysis of Variance, a statistical method used to compare means of three or more samples.

Hypothesized Distribution

A theoretical distribution used to make inferences about a population based on sample data.