A different factor that could be responsible for an observed effect between two other variables is defined as _____________.
a. a matched sample
b. a third variable
c. the directionality problem
d. both a third variable and the directionality problem
Question 2
A researcher finds that there is a relationship between the amount of time college students spend at the library and performance on tests. Specifically, the more time spent at the library, the higher students scored on their exams.
This relationship represents what type of correlation?
a. A positive correlation
b. A negative correlation
c. No correlation
d. An illusory correlation
The effect of thyroid hormones on tadpole development
Mars sketched as observed by Lowell sometime before 1914. (South top)
Lake-effect snow: Cold air over warm water
Effect of a catalyst on activation energy
Effect of Productivity Improvement in the Malthusian Model
The First-Pass Effect