Instructions
Question 1
In the description of the following experiment, determine the experimental factor. A team of physicians testing a new liquid drug taken using an inhaler for treating colds gave the drug to one group of volunteers enrolled for the test. They gave the other group water using the same kind of inhaler.
- Whether or not the subject’s cold was cured.
- The type of liquid by each group
- The new liquid drug
- All of the people in the study.
Question 2
A pharmaceutical company conducted an experiment to test a drug for controlling diabetes. The company enrolled participants for the experiment and divided them into 2 groups. One group received an inert drug and the other group received the diabetes control drug.
In the description of the above experiment, determine the experimental group.
- The group that received the inert drug is the experimental group
- The group that received the diabetic control drug is the experimental group
- Both the groups are experimental groups
- All people with diabetes.
Question 3
A scientist is interested in finding out the effect of soil quality on crop yield. Would an experimental or observational study design be more appropriate?
- An experimental study should be used with the crop yield as the controlled factor.
- An observational study should be used because the soil quality cannot be controlled.
- An experimental study should be used with the soil quality as the controlled factor.
- An observational study should be used because the crop yield cannot be directly controlled.
Question 4.
A biologist is interested in finding the relationship between the amount of sunlight and the growth rate of sunflowers. Would an experimental or observational study design be more appropriate?
- An experimental study should be used with the growth rate of the sunflowers as the controlled factor
- An observational study should be used because the amount of sunlight cannot be controlled.
- An experimental study should be used with the amount of sunlight as the controlled factor.
- An observational study should be used because the growth rate cannot be controlled.
Question 5
A researcher wants to evaluate the effect of using Facebook on happiness. Would an experimental or observational study design be more appropriate?
- An experimental study should be used with the use of Facebook as the controlled factor.
- An experimental study should be used with happiness as the controlled factor.
- An observational study should be used because it is not possible to control the use of Facebook.
- An observational study should be used because it is not possible to control happiness.
Question 6.
A researcher is interested in seeing if there is a relationship between the use of a particular software program and the age of the user. The researcher conducts a survey of adults in which she categorizes the respondents into one of two categories, either 18−35years old, or 35 years and older.
Is the study described as observational or experimental? If it is an experiment, what is the controlled factor?
- The study is an experiment. The controlled factor is the software.
- The study is an experiment. The controlled factor is the age category.
- The study is an observational study.
- The study is an experiment. The controlled factor is the survey.
Question 7
In the description of the following experiment, determine the experimental factor. During a study testing a new vaccine drug for the Zika virus, the research team grouped the volunteers enrolled for the test into Group A and Group B. Group A received an inert drug (placebo) while Group B received the vaccine drug.
- Whether or not a person contracts the Zika virus.
- All people who could contract Zika virus.
- The drug received by each group.
- The group receiving the new vaccine.
Question 8
In the description of the following experiment, determine the experimental factor. A research team is testing a paste form of a drug to alleviate inflammation. Participants are grouped into Team A and Team B. Team A receives the paste form of the drug. Team B receives a similar paste with no active ingredients.
- Team A and Team B.
- The Kind of paste received.
- The paste with the active ingredient.
- Whether or not the paste helps with inflammation.
ANSWERS
Question 1
In the description of the following experiment, determine the experimental factor. A team of physicians testing a new liquid drug taken using an inhaler for treating colds gave the drug to one group of volunteers enrolled for the test. They gave the other group water using the same kind of inhaler.
- Whether or not the subject’s cold was cured.
- The type of liquid by each group
- The new liquid drug
- All of the people in the study.
Question 2
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