Answer:
D
Explanation:
- I got this exact question on a econ usatestprep test.
Answer: 3) Confounding variable
Explanation:Confounding variable is the variable that indicates about the external influential factors that produces the manipulated consequences of independent and dependent variable.This variable can lead to producing useless outcomes in an experiment.
According to the question, the changes occurring in interest of student in algebra can be due to the outside factors which are not generating the actual results and thus, experiment is getting ruined.
Other options are incorrect because application variable remain same for the experiment,system variable are the variables of certain system and reliability variables describe about the variable on which dependent or stable.Thus, the correct option is option(3)
Answer:
Kept ignorant of the research hypothesis
Explanation:
A research hypothesis is a real, simple, and testable proposition or predictive assertion about the potential outcome of a scientific research study based on a specific property. A hypothesis is a tentative statement about the relationship between two or more variables.
Dr. Shaw conducts research on marital behaviors that predict divorce, he trains his students to observe and code videotapes of couples interacting, but the students are unaware of the anticipated outcomes of the study. There are kept ignorant of the research hypothesis.
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The following are the regions matched with their respective descriptions based of the geo-economic and geopolitical locations:
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1. Poor soil and first factories - Central
2. Confederate States of America, Coastal Plains American - Pacific
3. Earthquakes and volcanoes - Mountain
4. Cordillera states and Grand Canyon - Southern
5. Great Plains, last place settled - Prairie
6. Great Lakes and Mississippi for shipping goods - Northeastern
7. Covers southwest United States and the northern part of Mexico - Southwest Desert
