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Jun 0408:30 AM PDT
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For most test takers, Data Insights is the most challenging section on the GMAT, with test takers scoring several points lower on average on DI than on Quant or Verbal and completing the section with less time to spare.
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Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- Jun 03
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In Episode 7 of our GMAT Ninja CR series, we are rounding up the oddballs, the misfits, and the format-benders: EXCEPT, Fill-In-The-Blanks, and other unusual Critical Reasoning question types. When you see a question that ends with a literal blank line - Jun 10
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Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
13 Apr 2026, 18:25
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WA@akr6194
The key is to focus on the conclusion: the guidebook writer claims that carpenters before 1930 were more skilled than those after 1930, based on the hotels he visited.
To weaken this, we need to question whether his sample is truly representative.
Let’s eliminate the wrong choices:
A – Compares carpentry in hotels vs other structures: not relevant to the argument
B – Size or accommodation capacity doesn’t determine carpentry skill: irrelevant
C – If materials were similar before and after 1930, that actually strengthens the claim (it removes an alternative explanation)
E – Length of apprenticeship is not discussed in the argument: irrelevant
So we’re left with D.
Why D weakens the argument:
The writer only visited hotels that still exist from before 1930. But buildings with poor carpentry are less likely to survive over time. So his sample is biased toward the best-built older hotels.
This creates a survivorship bias: he’s comparing a filtered set of high-quality old hotels with a broader, less filtered set of newer ones. That makes older carpenters appear more skilled than they actually were.
It’s like saying “old music is better” because we still listen to classics from the past. We forget that many average or bad songs existed back then too. Only the best survived.
So, the conclusion is flawed because it’s based on a biased sample, making D the correct answer. I think now the explanation of GMATNinja will make sense.
WA@akr6194
Working through elimination works best in such cases. Most of the options in this question were irrelevant or strengthened the argument. After some practise, you will intuitively understand why the correct ones makes sense. For the first few questions that you practise, try writing reasons or explanations as to why you are eliminating something. It markedly improved my understanding of CR questions.
ankushsambare
Joined: 13 Jun 2022
Last visit: 03 Jun 2026
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Schools: ISB '27 Wharton '26 INSEAD Aug '26
GPA: 2.4
13 Apr 2026, 21:24
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Planning my attempt in June.
Ankush from Navi Mumbai, India.
Looking for a study partner for Verbal (RC).
I can help with Quant and DI. DM me if interested
Ankush from Navi Mumbai, India.
Looking for a study partner for Verbal (RC).
I can help with Quant and DI. DM me if interested
Manosij010
Joined: 18 Feb 2026
Last visit: 03 Jun 2026
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Schools: ISB '26 ESADE ESSEC MiM '27 HEC MiM '27 IIM INSEAD MiM '27
GPA: 5.72
13 Apr 2026, 21:30
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How closely do the question difficulty and scoring algorithm of E-GMAT Sigma X Mock tests mirror those of the real GMAT exam?
