question archive The local high school recently passed a rule reducing how much teachers can count homework as part of a student's grade
The local high school recently passed a rule reducing how much teachers can count homework as part of a student's grade
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The local high school recently passed a rule reducing how much teachers can count homework as part of a student's grade. Consequently, a larger portion of the students stop doing their homework. A teacher there decides to conduct an experiment. All of his classes get an optional "test guide" to help them study for their tests.
He allows two classes to use the "test guides" (that they must fill in and complete) on their exams. He hypothesizes that students will complete the test guides and learning will occur from filling them out. In his other 2 classes, the teacher does not allow students to use test guides on the exam, and consequently very few of them filled them out.
After the 2017-2018 year is over, he wants to compare scores between the 4 classes on the final exam to see if allowing students to use test guides during each test throughout the year improved their later overall performance.
Independent Variable: _____________________________ Dependent Variable: ___________________________________
Experimental Group: _______________________________ Control Group: _________________________________________
3 constants: ______________________________________________________
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Answer:
Independent variable: (using of) test guides
Dependent variable: test scores
Experimental group: Two classes who used test guides
Control group: Two classes who did not use any test guides
Three constants:
test (or difficulty of test)
number of classes per group
grading system
Explanation
The cause is the independent variable. Its value is unaffected by the other study variables. In the given problem, the test guides are not being affected by factors, which makes it the independent variable.
Effect is the dependent variable. Changes in the independent variable affect its value. In the given problem, test scores are being affected by the use of test guides.
The group that gets the variable under test in an experiment is known as the experimental group. In the given problem, it is the two classes that uses test guides. On the other hand, the control group is the one that does not receive the experimental variable, just like the two classes with no used test guides.
Lastly, a constant is an unchanging amount. The test (or difficulty of test), number of classes per group, and grading system are not changing all throughout the problem, making them the constants.
