Observational Studies and Experiments

Question 1

In an experiment to test the effectiveness of an energy supplement, participants are randomly assigned to groups by using a table of random digits. Which of the following best describes the control group in the experiment?

Revolt · Accepted Answer

A: The control group is the group who received protein bars without the energy supplement.

Question 2

In an experiment to test the effectiveness of an energy supplement, participants are randomly assigned to groups by using a table of random digits. Which of the following accurately describes the benefit of comparison in the experiment shown in the design web?

Revolt · Accepted Answer

C: The energy levels of those in the treatment group and in the control group can be compared to determine if the ingredient had a significant effect.

Question 3

The subjects in the who received the reported in their headache symptoms during the experiment. This is a possible placebo effect.

Revolt · Accepted Answer

A: control group

Question 4

This experiment is an example of experiment.

Revolt · Accepted Answer

A: a double blind

Question 5

The should not be informed about the different versions of the medication to reduce the influence of .

Revolt · Accepted Answer

A: test subjects

Question 6

The should not be informed about the different versions of the medication to reduce the influence of .

Revolt · Accepted Answer

B: the placebo effect

Question 7

Which of the following represent controls in the experiment? Check all that apply.

Revolt · Accepted Answer

B: Number of hours of sun exposure; C: Amount of sunscreen applied; D: Intervals of sunscreen application

Question 8

Which of the following accurately describes the benefit, if any, of control in the experiment?

Revolt · Accepted Answer

A: By controlling variables that may influence the response variable, we reduce variability in the response variable.

Question 9

A college professor conducts an experiment to determine if students perform better on exams when they study alone or in small groups. A total of 150 students taking an introduction to sociology course volunteer to participate in the study. Students are randomly assigned either to study alone for an upcoming exam or are assigned to a study group. The exam grades are then compared. Which of the following accurately describes the benefit of random assignment in the experiment?

Revolt · Accepted Answer

A: Students of different abilities are more likely to be evenly distributed, so any differences observed in the exam grades are more likely to be a result of the treatment.

Question 10

There are experimental units in each treatment group. There are experimental units in all. The large number of loaves baked for each group allow for good comparison of the differences in shelf life.

Revolt · Accepted Answer

B: 50

Observational Studies and Experiments Answers

More from this Course

TRY EDGENUITY HACKS