, determine whether the study is an experiment or an observational study, and th
ID: 3298500 • Letter: #
Question
, determine whether the study is an experiment or an observational study, and then identify a major problem with the study.
Online News – In a survey conducted by USA Today, 1465 Internet users chose to respond to this question posted on the USA Today electronic edition: “Is news online as satisfying as print and TV news?” 52% of the respondents said “yes.”
Drinking and Driving – A researcher for a consortium of insurance companies plans to test for the effects of drinking on driving ability by randomly selecting 1000 drivers and then randomly assigning them to two groups: One group of 500 will drive in New York City after no alcohol consumption, and the second group will drive in New York City after consuming three shots of Jim Beam bourbon whisky.
Explanation / Answer
Online news - This is an observational study
The question was posted in an electronic edition of the magazine. So, the people who responded are more likely to be the ones who are in favor of reading electronic magazines. So, there will be a bias in the opinion. If the respondents were randomly chosen from viewers of online, TV and print news, this bias could have been eliminated.
Drinking and driving - This is an experimental study.
The major problem with this study is that it is illegal or unethical, as the study put life of people at risk. The inoticated drivers may harm themselves or others. In this scenario, it is better to take historical records of accidents and see if the driver had consumed alcohol or not. This kind of observational study would have been more suitable for this research.
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