For his research study,Dr.Safar wants to make sure that his sample is a representative one.The most effective way for him to do this is to
A) use random selection.
B) calculate the correlation coefficient.
C) make sure that the standard deviation is low.
D) use a scatter diagram.

Question

Quizplus · Accepted Answer

Using random selection is the most effective way to ensure that a sample is representative. This means that every member of the population has an equal chance of being selected for the sample, which helps to reduce bias and increase the generalizability of the findings to the larger population. Calculating the correlation coefficient, reducing the standard deviation, and using a scatter diagram are all methods of analyzing data once a sample has been selected, but they do not address the issue of selecting a representative sample in the first place.

For His Research Study,Dr