Donna is a school district administrator and is interested in comparing the effectiveness of two teaching approaches for teaching high school math: activity-based learning and textbook presentation. To investigate, she identifies high school students in the district who were taught math last year using only activity-based learning and who were taught using only textbook presentation. She then refers to the schools' databases and retrieves last year's math final exam scores for these students. Donna plans to compare the final exam scores between the two groups. (a)First choose whether the procedure described above is an observational study or a designed experiment. Then further categorize the procedure by choosing the correct type of observational study or designed experiment.
Added by Bert E.
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She is simply observing and collecting data from existing records. This means the procedure is an observational study, not a designed experiment. Show more…
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Donna is a school district administrator and is interested in comparing the effectiveness of two teaching approaches for teaching high school math: activity-based learning and textbook presentation. To investigate, she identifies high school students in the district who were taught math last year using only activity-based learning and who were taught using only textbook presentation. She then refers to the schools' databases and retrieves last year's math final exam scores for these students. Donna plans to compare the final exam scores between the two groups. (c)Suppose there is a significant difference in final exam scores between the students taught using the activity-based learning approach and the students taught using the textbook presentation approach. Would Donna be well-justified in claiming that the difference in final exam scores was caused by the choice of teaching approach? Choose the best answer below.
Luke H.
Donna is a school district administrator and is interested in comparing the effectiveness of two teaching approaches for teaching high school math: activity-based learning and textbook presentation. To investigate, she identifies high school students in the district who were taught math last year using only activity-based learning and who were taught using only textbook presentation. She then refers to the schools' databases and retrieves last year's math final exam scores for these students. Donna plans to compare the final exam scores between the two groups. (b)Which one of the following best describes the explanatory (independent) and response (dependent) variables? The explanatory variable is the final exam score and the response variable is the teaching approach. The explanatory variable is the teaching approach and the response variable is the level of math course. The explanatory variable is the level of math course and the response variable is the final exam score. The explanatory variable is the teaching approach and the response variable is the final exam score.
Sandra K.
A teacher believes that giving her students a practice quiz every week will motivate them to study harder, leading to a greater overall understanding of the course material. She tries this technique for a year, and everyone in the class achieved a grade of a least C. Is this an experiment or an observational study? (A) An experiment, but with no reasonable conclusion possible about cause and effect (B) An experiment, thus making cause and effect a reasonable conclusion (C) An observational study, because there was no use of a control group (D) An observational study, but a poorly designed one because randomization was not used (E) An observational study, and thus a reasonable conclusion of association but not of cause and effect
Md.Daniyal A.
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