Question

question #7
in a study of uga students awareness of world issues, a television crew sampled students entering the library. this study is an example of:
a volunteer response sample
a convenience sample
a stratified random sample
a simple random sample
question #8
an experiment to study the success of a new medication splits a group of 100 participants into two groups randomly. the first group gets the new medication, and the second group gets a fake treatment. no participant knows which group they have been placed in. it is observed that 80% of the participants in the first group experiences improvement and 15% of the participants in the second group experience improvement. which of the following best explains why the participants receiving the fake treatment showed improvement?
the placebo effect
confounding
control
blinding

Explanation:

Question #7

A convenience sample is a non - random sample where subjects are chosen because they are easily accessible. In this case, students entering the library are chosen for the study, which is convenient for the television crew. A volunteer response sample would involve people self - selecting (e.g., responding to a call - in survey). A stratified random sample divides the population into subgroups (strata) and samples from each stratum. A simple random sample gives every member of the population an equal chance of being selected, which is not the case here as only library - entering students are sampled.

The placebo effect occurs when a person's physical or mental health appears to improve after taking a placebo (a fake treatment). In this experiment, the second group received a fake treatment but still showed some improvement. Confounding refers to a situation where a variable not being studied affects the relationship between the variables being studied. Control is about having a group (like the placebo group here) for comparison. Blinding is about participants (single - blind) or both participants and researchers (double - blind) not knowing which treatment is given, but it doesn't explain the improvement in the placebo group.

Answer:

A convenience sample

Question #8