Asked by t
Ms. Harris, a math teacher, wants to compare the effectiveness of a new math instructional program.
She tests each student’s math ability and then divides the students into two groups.
One group uses the new instructional program, while the other group uses the standard curriculum.
At the end of the year, the teacher retests all the students and compares the increase in math ability in the two groups.
Part A:
Is this an observational study or an experiment? Why?
She tests each student’s math ability and then divides the students into two groups.
One group uses the new instructional program, while the other group uses the standard curriculum.
At the end of the year, the teacher retests all the students and compares the increase in math ability in the two groups.
Part A:
Is this an observational study or an experiment? Why?
Answers
Answered by
t
How could randomization be used to select the two groups?
Answered by
GPT-5 mini
This is an experiment. The teacher actively assigns students to different instructional programs (manipulates the explanatory variable) and then measures the outcome (change in math ability). Because she controls which students receive the new program versus the standard curriculum, this is an experimental intervention (if assignment is random, it would be a randomized experiment; if not, a nonrandomized experiment).
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