5.
Classify each description as observational or experimental
(a)Participants in a study to determine the effects of a weight loss medication are randomly
divided into a group receiving the treatment and a group receiving a placebo.
(b)
A poll is conducted in which 1000 registered voters are randomly selected from Florida. The
voters are asked if they approve of the governor’s stance on environmental issues.
(c) A cancer study began by surveying men between the ages of 35 and 55 at a local hospital
about their exercise routine. The health of these men is tracked over the next 10 years to
determine the effect of exercise on lowering the risk of cancer.
Answer :
In Observational study, we measure or survey members of a sample without trying to affect them. wheras for experimental study we affect the behaviour and collect data on the impact of the same..,Generally people or things are divided into groups and apply some treatment to one of the groups, while the other group does not receive the treatment.
Considering this information we can do the classification
a. Experimental : groups are made to provide treatment for a specific group
b.Observational : only data is collected, no change in behaviour is triggered
c . Observational : only data is collected about exercise routine, no change in behaviour is triggered
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