John C. Calhoun--------hope this helps... rate me brainliest
Cotton constantly needs the name nutrients from the soil and finally the soil didn’t have those nutrients and were no longer able to house cotton that’s often why farmers switch they’re crops yearly so the soil can rebuild the nutrients it needs
Answer:
the third variable problem
Explanation:
Third variable: In psychological research, the term third variable is also referred to as the confounding variable and is defined as a factor except for the independent variable in research that may cause an effect to the result.
Third variable problem: The third variable i.e, the confounding variable is responsible for making a mistake in the causal relationship between the other two variables present in an experiment.
In the question above, the given statement combination of factors is known as the third variable problem.
Answer:
A population-D
Explanation:
A population is referred to a large collection of individuals or objects that is the main focus of an experiment or scientific research query. It is also called A research population because it considers a defined collection of individuals or objects who have similar binding characteristics.
Professor DeVries randomly selected and interviewed 50 of the school's students of Oakbridge School. He is using a well defined collection of student with same characteristic ie same school . His study is using a Population. Note that "random" here implies a subset of a population.
It depends how much each pound of bananas are
