Question

Based solely on the information​ given, do you have reason to question the results of the following hypothetical​ study? Explain your reasoning. In a study designed to determine whether bicyclists who wear helmets have fewer​ accidents, researchers tracked 500 riders with helmets for one month.

A.​Yes, there is reason. The sample is​ biased; riders who do not use helmets should also be included.
B.​No, there is not reason. The goal of the study is clear.
C.​No, there is not reason. There is no bias in the study.
D.​Yes, there is reason. The variables that were measured are not identified.
E.​Yes, there is reason. It makes sense that riders who do not use helmets get into more accidents.
F.​No, there is not reason. It is unlikely that there are any confounding variables in the study.

Answer 1

The study is biased as it only tracked bicyclists with helmets and did not include a control group without helmets, which is crucial for a valid comparison.

Step-by-step explanation:

Based solely on the information given, there is reason to question the results of the hypothetical study. In a study designed to determine whether bicyclists who wear helmets have fewer​ accidents, researchers tracked 500 riders with helmets for one month.

The reason for questioning is that the study's sample is biased.

For a reliable study on whether bicyclists who wear helmets have fewer accidents, it is necessary to track both riders with helmets and those without helmets to establish a comparison group. Without including a control group of riders not wearing helmets, the study cannot properly assess the effect of helmets on the frequency of accidents.