Hey everyone, I'm having some trouble with this AP Stats question.
Two studies are run to determine the effect of low levels of wine consumption on cholesterol level. The first study measures the cholesterol levels of 100 volunteers who have not consumed alcohol in the past year and compares these values with their cholesterol levels after 1 year, during which time each volunteer drinks one glass of wine daily. the second study measures the cholesterol levels of 100 volunteers who have not consumed alcohol in the past year, randomly picks half of the group to drink one glass of wine daily for a year while the others drink no alcohol for a year, and finally measures their levels again. which of the following is a true statement?
a) the first study is an observational study and the second is an experiment
b) the first study is an experiment and the second is an observational study
c) both are observational studies, but only one uses randomization and a control group
d) the first study is a census of 100 volunteers while the second is an experiment
e) both studies are experiments
I am inclined to choose A, because the first study really seems like a study and the second one would therefore not be a study, as they have different characteristics.Would i be correct in choosing A?Some of the other answers seem like they might work, particulary B and C.
Thanks
Audentes
Two studies are run to determine the effect of low levels of wine consumption on cholesterol level. The first study measures the cholesterol levels of 100 volunteers who have not consumed alcohol in the past year and compares these values with their cholesterol levels after 1 year, during which time each volunteer drinks one glass of wine daily. the second study measures the cholesterol levels of 100 volunteers who have not consumed alcohol in the past year, randomly picks half of the group to drink one glass of wine daily for a year while the others drink no alcohol for a year, and finally measures their levels again. which of the following is a true statement?
a) the first study is an observational study and the second is an experiment
b) the first study is an experiment and the second is an observational study
c) both are observational studies, but only one uses randomization and a control group
d) the first study is a census of 100 volunteers while the second is an experiment
e) both studies are experiments
I am inclined to choose A, because the first study really seems like a study and the second one would therefore not be a study, as they have different characteristics.Would i be correct in choosing A?Some of the other answers seem like they might work, particulary B and C.
Thanks
Audentes
