Question

Classify each description as either an observational study or an experiment. 1.) Participants in a study to determine the effects of a weight loss medication are divided into a group receiving the treatment and a group receiving a placebo. The groups are revealed at the conclusion of the study. 2.) A group of researchers randomly selects 4000 citizens of eight highly populated cities in the United States to study the health effects of pollution. The health of each subject is monitored over a five-year time span. 3.) Agricultural scientists seek to test the effects of a new pesticide on corn crops. Half of the participating farmers are assigned the new pesticide and the other half continue using an alternative pesticide. The crops are compared after two seasons. 4.) Random homeowners in a particular city are divided into two groups, those that currently use solar panels in their homes and those that do not. All participants are surveyed to determine whether electric bills are lower for those with solar panels. 5.) A cancer study began by surveying male patients between the ages of 35 and 55 at a local hospital about their exercise routine. The health of these men is tracked over 10 years to determine the effect of exercise on lowering the risk of cancer. 6.) Researchers studying how exercise affects cholesterol sample 50 people who exercise regularly and 50 who do not. Blood was drawn from each person and serum cholesterol was measured.

          Classify each description as either an observational study or an
experiment.
1.) Participants in a study to determine the effects of a
weight loss medication are divided into a group receiving the
treatment and a group receiving a placebo. The groups are revealed
at the conclusion of the study.
2.) A group of researchers randomly selects 4000 citizens of eight
highly populated cities in the United States to study the health
effects of pollution. The health of each subject is monitored over
a five-year time span.
3.) Agricultural scientists seek to test the effects of a new
pesticide on corn crops. Half of the participating farmers are
assigned the new pesticide and the other half continue using an
alternative pesticide. The crops are compared after two
seasons.
4.) Random homeowners in a particular city are divided into two
groups, those that currently use solar panels in their homes and
those that do not. All participants are surveyed to determine
whether electric bills are lower for those with solar panels.
5.) A cancer study began by surveying male patients between the
ages of 35 and 55 at a local hospital about their exercise routine.
The health of these men is tracked over 10 years to determine the
effect of exercise on lowering the risk of cancer.
6.) Researchers studying how exercise affects cholesterol sample 50
people who exercise regularly and 50 who do not. Blood was drawn
from each person and serum cholesterol was measured.

Added by Audrey E.

Question

Please give Ace some feedback