Question

A student researcher conducts an experiment that investigates the effects of a new mathematics website on student achievement. She randomly assigns students to two groups: one that receives supplemental instruction from the website and one that doesn't receive the supplemental instruction. Each sample consists of 20 students. Observations of student engagement are rated by the researcher, according to an engagement scale. How could this study be improved?
Select all that apply.

A. Have another researcher provide ratings, as well.

B. Administer a quiz or exam that gauges student understanding.

C. Increase the sample size.

D. Limit observations to students who are engaged.

Answer 1

A. Have another researcher provide ratings, as well.

B. Administer a quiz or exam that gauges student understanding.

C. Increase the sample size.

Step-by-step explanation:

This is a simple scientific investigation that is seeking to test how the new mathematics website is affecting students achievement.

Like every scientific study, a more representative interpretation can be deduce when the population sample is much more. This will eliminate any error in the study. It is preferable for the student researcher to increase the sample size

Also, another researcher can be hired to provide ratings as well. In the scientific community, it is desirable to collaborative efforts from different researchers in a study. This will improve the approval rating and acceptability of the results and interpretation deduced.

A quiz or an exam will provide a more quantitative way of measuring the impact of the mathematics website on the student. From this, a statistical tool can be perfectly used to gauge the understanding of the student.

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Experiment brainly.com/question/2088386

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