BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0563 reviews
Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep
NEWSWEEK READERS’ CHOICE AWARDS 2026

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Question from GMAC GMAT Review 11th Edition

Expert replies
by pranavc » Sat May 31, 2008 11:45 am
Hi All,
I am really stuck on the following question below:

In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results.

Which of the following, if true, gives the most support to the recommendation above?

(A) The accepted treatment for pironoma does not have damaging side effects.

(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect pironoma.

(C) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.

(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma.

(E) All laboratory tests to detect pironoma have the same proportion of false negative results.

At first glance, this looked like an easy question but based on the answer and its rather convoluted explanation, I am not too sure anymore. Any input would be appreciated. Thanks in advance,

Regards,

Pranav
Join the discussion
Source: — Critical Reasoning |

by chidcguy » Sat May 31, 2008 12:06 pm
Look at the conclusion. physicians should use the laboratory test that has the lowest proportion of false positive results.

So what happened to the false negative results. In other words the conclusion is ignoring the impact of false negative results. When will this happen? Some instances are

(1) these days the tests do not have any false negatives at all. So pick the one with lowest false positives.

(2) all the tests have same/similar number of false negatives but some have low & high false positives. Then also pick the one with lowest false positives makes sense.

E mirrors the (2) thought and hence my answer is E.
Join the discussion

by pranavc » Sat May 31, 2008 12:56 pm
Breaking it down into two parts like you did clarifies things. I guess the focus is on "lowest false positives" and not just false positives. That puts things in perspective. Thanks a lot.

Regards,

Pranav
Join the discussion

by wawatan » Sat May 31, 2008 1:09 pm
i know e is a better answer but can someone explain why d is incorrect?
Join the discussion

by chidcguy » Sat May 31, 2008 4:32 pm
(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma.

The key word trap D uses is proportion. inconclusive test result?? Wait a sec. There is nothing like inconclusive test result in the stimulus. That makes it out of scope. Not only it is out of scope, but also it does not add any more information to strengthen the conclusion that only tests false positives should be used to determine P.

We can strengthen an argument

by adding more evidence or by substantiating an underlying assumption.

(E) adds more evidence
Join the discussion

by airan » Tue Jun 03, 2008 6:49 am
Why cant it be B ? B states it clearly.
Thanks
Airan
Join the discussion

by khanshainur » Tue May 10, 2016 4:20 am
i would go with option E
Join the discussion