LSAT 2 – Section 4 – Question 05

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October 1991

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Question QuickView	Type	Tags	Answer Choices	Curve This gives you an idea of how this question is “curved”— in other words, what level of scorer is likely to get this question right. It shows a model of scaled LSAT score vs probability of getting the question correct. It is based on student test results for each question. The gray bar extends from the score for a 25% chance, to the score for a 75% chance of getting the question correct. The black line in the middle is the score for a 50% chance of getting the question correct. The percentage at the right is the expected chance of someone with the same score as you on that PrepTest getting that question correct	Question Difficulty	Psg/Game/S Difficulty	Explanation

Question QuickView	Type	Tags	Answer Choices	Curve This gives you an idea of how this question is “curved”— in other words, what level of scorer is likely to get this question right. It shows a model of scaled LSAT score vs probability of getting the question correct. It is based on student test results for each question. The gray bar extends from the score for a 25% chance, to the score for a 75% chance of getting the question correct. The black line in the middle is the score for a 50% chance of getting the question correct. The percentage at the right is the expected chance of someone with the same score as you on that PrepTest getting that question correct	Question Difficulty	Psg/Game/S Difficulty	Explanation
PT2 S4 Q05	+LR	Weaken +Weak	A 3% 154 B 87% 160 C 4% 153 D 3% 153 E 4% 156	120 129 146	+Easiest	145.613 +SubsectionMedium

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Here we have a weakening question, indicated by: Which one of the following, if true, would tend to invalidate use of the ratings for the agency’s purpose?

So we’ve got a government rating system where the highest ranked airlines are the ones with the lowest proportion of late flights. So the number one airline would be the one whose ratio of total flights to late flights is the lowest. From the question stem, we know we want to weaken the agency’s reasoning for why this rating would be good for their purpose. We’re next told what this purpose is; the agency thinks the rating can establish an objective measure of the efficiency of the airlines personnel in meeting flight schedules. So the conclusion we want to weaken here is that the proportion of late flights actually represents how efficient the staff of each airline are. We can think of this as hypothesis; the agency believes the reason airlines have more or less late flights is the efficiency of their staff. A good answer choice will be one which introduces an alternate explanation for why airlines are late. On to the answers:

Answer Choice (A) Ok, but this wouldn’t affect whether the staff are what determine flights being late.

Correct Answer Choice (B) If flights are often made late by weather, and some airlines are more affected than others, then it is unlikely the rating would be representative of staff performance because a lot of the time it’s out of their control.

Answer Choice (C) This gives us a reason why being late isn’t always the end of the world, but has no bearing on whether the lateness of flights reflects staff performance.

Answer Choice (D) This is totally compatible with what we want to weaken.

Answer Choice (E) Who cares how we define a late flight? Our interest is in whether lateness represents inefficiency on the part of flight staff.

LSAT 2 – Section 4 – Question 05

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LSAT PrepTest 2 Explanations

Section 1 - Reading Comprehension

Section 2 - Logical Reasoning

Section 3 - Logic Games

Section 4 - Logical Reasoning

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