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A teacher believes that whatever he says in class has no effect on his students.
Just as he's about to quit his profession, a statistician enters the room and
suggests that the teacher design a study to test his assumption. The study will
look at whether providing in-class feedback on homework assignments
enhances classroom performance.
The teacher wants to know whether providing feedback before or after
returning the assignments is most useful. He's also interested in the most
effective means of presenting the feedback: verbal presentation, written
handout, or a summary on overheads. Ultimately, he'd like to identify the best
approach for increasing test scores of the students. There are 12 classes
available in the school for the experiment.
Design an experiment that helps answer these questions. Be sure to identify
the factors, the levels of the factors, the treatment groups, and the response
variable. Comment on how the students will be assigned to the different
treatment groups. Is it possible to use simple random assignment of all
students? As much as possible, use diagrams instead of words to summarize
your experimental design.

Respuesta :

italiaprez

Answer:

-6 different methods/variables

Step-by-step explanation:

First of all, the 12 groups will be divided into 6 different methods, as the variables are 6:

1.- Feedback before the assignment and verbal presentation.

2.- Feedback before the assignment and written handout.

3.- Feedback before the assignment and summary.

4.- Feedback after the assignment and verbal presentation.

5.- Feedback after the assignment and written handout.

6.-Feedback after the assignment and summary.

Each group will work with the variable chosen.

The other variables can becover with the fact that each group has its own diversity (different types of student´s personalities)

The teacher will work with each group in the same topic with its different types of assignments and feedbacks and at the end, she will test each student and make an average score of each of the groups, which she will compare and the highest score will be the one she will be using for all the students.

Also, she could use the 3 top variables with the students in order to have diversity in her activities.

Is it possible to use simple random assignment of all students? It is possible, but harder to analize, so is better to have groups already assigned.

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