5. Researchers have developed a new computer-based self-paced course to teach al

Question

5. Researchers have developed a new computer-based self-paced course to teach algebra to students of varying ability. To test the effectiveness of the new method, researchers will administer a pre-test to 60 students taking part in the study. Half the students will be taught algebra in a traditional classroom, while the other half will receive instruction via the new method. A post-test will be given to all students upon completion of their instruction, and post-test results will be compared to pre-test results. A. Is this an observational study or an experiment? (6 points) B. Explain how you would randomize. That is, how would you decide which children get taught with which method? (6 points)

Explanation / Answer

A.

It is an experiment beaucse here we change the method of teaching for some students and want to know the effect of that method.

B.

You can use slips of name corresponding to each student. Mis the slips in a box and will pick slip one by one until 30 slips and then assign them either new method or old method. And for rest 30 students assign remaining method.

or

Here you can use random number table.

(c)

For matched pair, each pair should have one student with high math ability and other with low math ability. Then reascher should teach them with same method. After that test scores would be compared with matched pair test.

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