Experiments
Experiment (cont)
100
When conducting an experiment what is the group with the ones receiving dosages called after doing a random comparative experiment?
Treatment group
100
A pharmaceutical company wants to test the effectiveness of a new allergy medication. They randomly assign 500 participants to receive the new drug and another 500 participants to receive a placebo. Neither the participants nor the researchers know who gets the real medication.
What type of experimental design is being used?
Random comparative experiment
200
In a study examining how the number of hours studied affects exam scores, what is the variable that is being manipulated or controlled to observe its effect on the outcome?
Explanatory variable
200
A researcher is studying the effect of different amounts of fertilizer on the growth of tomato plants. They measure the height of the plants after four weeks.
What is the response variable in this experiment?
Height of the plants
300
When a treatment group doesn't know it is receiving a dosage and neither does the person conducting the experiment know what he's giving, what type of blinding is this?
Double blinding experiment
300
A study shows that there is a strong positive correlation between ice cream sales and the number of drownings in a given area. Does this mean that eating ice cream causes more drownings? If not, what other factor might explain this relationship?
lurking variable, Hot weather
400
When a group is specifically given a placebo, what group is this called? 
Control group
400
In a _____________ experiment, the participants do not know whether they are receiving the treatment or a placebo, but the researchers do.
Single blinded
500
if it is said that a placebo was significantly showing results among patients within an experiment, what is this called?
Placebo effect.
500
A study finds that people who drink more coffee tend to have lower rates of heart disease. However, researchers later discover that coffee drinkers are also more likely to exercise regularly.
What issue in the study might explain this unexpected relationship?
confounding variable, exercise