select the correct answer.\nyou are conducting a study on the health of people who have been exposed to…

select the correct answer.\nyou are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to radiation. which of these methods of obtaining data should you most likely adopt and why?\na. an observational study because it involves the pre - existing condition of the subjects\nb. an experimental study because it will give the most accurate results\nc. an experimental study because results can be obtained much faster using this technique\nd. a sample survey with only people who were not exposed to radiation because it involves random selection\ne. a sample survey with only people who were exposed to radiation because it involves random selection

select the correct answer.\nyou are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to radiation. which of these methods of obtaining data should you most likely adopt and why?\na. an observational study because it involves the pre - existing condition of the subjects\nb. an experimental study because it will give the most accurate results\nc. an experimental study because results can be obtained much faster using this technique\nd. a sample survey with only people who were not exposed to radiation because it involves random selection\ne. a sample survey with only people who were exposed to radiation because it involves random selection

Answer

Brief Explanations:

In this case, the subjects already have a pre - existing condition of being exposed or not exposed to radiation. An observational study is appropriate as it involves observing and analyzing data without interfering with the subjects' pre - existing conditions. Experimental studies would involve manipulating variables, which is not ethical or practical here as you cannot deliberately expose people to radiation. Sample surveys focusing only on one group (exposed or non - exposed) would not give a complete picture for comparison.

Answer:

A. an observational study because it involves the pre - existing condition of the subjects