Critical Reasoning (CR) | In a ten-year study, one group of volunteers was given a medical

­ What the Researchers AreSaying:

The researchers believe disease X disappeared in some individuals in the second group (single screening) because they weren't diagnosed with it at the end of the study.

This implies the second group initially had thedisease but somehow got rid of it withouttreatment .

However, the conclusion relies on the assumption that all those not diagnosed in Group B were trulyhealthy.


The Missing Piece and Why Option (E) isCritical:

The key concern is the possibility of falsenegatives in Group B. These are individuals who actually had the disease but weren't diagnosed because of the singlescreening.

Option (E) addresses the frequency of falsenegatives in the screening test used. 

If the test has a high rate of false negatives, it could explain the lower diagnosis rate in Group B.

Missed diagnoses (false negatives) are a more likely explanation for the difference in diagnosed cases than the disease disappearing on itsown.


A. Lifestyle
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Statistics : Posted by Gemmie • on 02 Aug 2023, 04:00 • Replies 9 • Views 10079

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