A medical researcher trying to establish the efficacy of a n

A medical researcher, trying to establish the efficacy of a new drug, has begun testing the drug along with a placebo. To make sure that the two groups of volunteer patients – those receiving the drug and those receiving placebo – are as nearly alike as possible, the researcher has decided not to rely on chance but rather to carefully scrutinize the volunteers and the choose the groupings himself. Is this approach advisable…? Why or why not?

Solution

Carefully choosing the two groups of volunteer patients is a necessary step to rely on the conclusion based on the group.

Hence his approach is very good and he is right in concentrating on this to get a reliable result on the groups.

For hypothesis testing for paired test for comparing two means, randomness, and the sample representing the true population are essential.

Hence it is suitable to scrutinize the volunteers who are really representing the population or for some other reason they volunteeered.