A study claimed that people who r recorded how stressed they felt b. Is this an
ID: 3376680 • Letter: A
Question
A study claimed that people who r recorded how stressed they felt b. Is this an example of a completely randomized design, or a crossover design? Explain a. Identify the response variable s). consume caffeine regularty may experience higher stress and difficulty breathing. In the experiment, 51 regular coffee drinkers milligrams of caffeine in pill form for one week, and another 51 took a placebo The researchers monitored the subjects' respiration and the subjects a. Identify the response variable(s), explanatory variable, experimental units, and the treatments O A. the caffeine pill or placebo pill O B. the 102 regular coffee drinkers O C. the consumption of caffeine O D. the respiration and reported stress levels Identify the explanatory variable O A. O B. O c. the 102 regular coffee drinkers the respiration and reported stress levels the consumption of caffeine D. the caffeine pil or placebo pill Identify the experimental units O A. the 102 regular coffee drinkers O B. the caffeine pill or placebo pill O c. the respiration and reported stress levels 0 D. the consumption of caffeine Click to select your answer.Explanation / Answer
a. Response variable:
respiration and reported stress levels
Explanatory variable: consumption of caffeine
Experimental units: 102 regular coffee drinkers
Treatments: caffeine pill or placebo pill
b. Completed randomised design as subjects take only one treatment (Option C).
In crossover design, same subject is given 2 treatments at different times.
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