Question

question #3
which type of statistical study is represented in this example?
a fitness instructor wants to test the effectiveness
of a pre - workout drink. she gives participants in one group the pre - workout drink and a placebo drink to another group.
long range study
survey
experiment
observational study
question #4
determine if the following scenario is best described as an observational study, survey, or experiment.
a researcher wants to determine the effects of eating a vegan diet on overall health. the researcher finds 200 individuals, where 100
of them have eaten vegan for the past five years and the other 100 have not eaten vegan for the past five years. the participants are
each given a health assessment and the data is analyzed in order to draw conclusions about how eating vegan can affect ones
overall health.
experimental study
survey
observational study

Explanation:

• Question #3: An experiment involves manipulating a variable (here, giving different drinks - pre - workout drink and placebo). The fitness instructor is actively intervening by giving different treatments to different groups.
• Question #4: An observational study does not involve any manipulation of variables by the researcher. The researcher is just observing the existing conditions (vegan or non - vegan diet over the past five years) and then assessing health.

Answer:

• Question #3: C. Experiment
• Question #4: C. Observational study