When conducting an observational study, which of the following is crucial to ensure that the sample accurately represents the population?(1 point) Responses Selecting participants who are easiest to reach. Selecting participants who are easiest to reach. Choosing a sample that only includes people with similar characteristics. Choosing a sample that only includes people with similar characteristics. Using a random selection method where every member of the population has an equal chance of being selected. Using a random selection method where every member of the population has an equal chance of being selected. Collecting data only from a specific subgroup of the population to simplify the study. Collecting data only from a specific subgroup of the population to simplify the study.

Answer 1

The crucial approach to ensure that the sample accurately represents the population in an observational study is using a random selection method where every member of the population has an equal chance of being selected. This method helps to eliminate bias and allows for a more representative sample, which is essential for the validity of the study's findings.