Question

A community college professor is interested in determining the relationship between the number of posts students make on Schoology and their respective grades. He planned to correlate the results from a sample from all his classes, however, due to time constraints, he decided to sample only from students with high grades. As his statistical consultant, state whether or not you support his plans and why.

Answer 1

As a statistical consultant, we are not support the plan of the professor.

Because, he want to correlate the results from a sample to all his classes. So he must select the sample randomly from the

population. here population is the students of the college. The randomly selection of the sample allow him to apply the statistical

methods for the further analysis and drawing the inferences about the whole population. And if he select sample only from

students with high grades then the result is biased toward the high grades students.