I hate subjective questions

vstraight
Posts: 37
Joined: Mon Sep 27, 2010 12:44 am

I hate subjective questions

Postby vstraight » Mon Sep 27, 2010 7:56 pm

I was just doing Preptest C and one question in LR (question #9 section 3) struck me as kind of subjective.

Is 125 large corporations a reasonable sample to base a generalization about large corporations in general? I thought it wasn't but obviously I was wrong...

Sandro
Posts: 2526
Joined: Sat Jul 18, 2009 12:12 am

Re: I hate subjective questions

Postby Sandro » Mon Sep 27, 2010 7:58 pm

isnt 30 the magic number? Or was I sleeping through that part in stats lol

vstraight
Posts: 37
Joined: Mon Sep 27, 2010 12:44 am

Re: I hate subjective questions

Postby vstraight » Mon Sep 27, 2010 8:01 pm

Sandro777 wrote:isnt 30 the magic number? Or was I sleeping through that part in stats lol


I have no idea lol.

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Cromartie
Posts: 200
Joined: Wed Aug 18, 2010 12:27 pm

Re: I hate subjective questions

Postby Cromartie » Mon Sep 27, 2010 8:17 pm

Sandro777 wrote:isnt 30 the magic number? Or was I sleeping through that part in stats lol


You got it. 30 and up is generally considered a statistically significant sample size.

KaplanLSATInstructor
Posts: 53
Joined: Fri Sep 12, 2008 5:53 pm

Re: I hate subjective questions

Postby KaplanLSATInstructor » Tue Sep 28, 2010 12:07 pm

Actually, I don't think any knowledge of statistics is required here. The problem with (E) is that we don't KNOW whether that sample is unrepresentative. The data involves large corporations and the conclusion is about large corporations. For all we know, the large corporations selected for the poll are a perfect mix, providing an excellent sampling.

Of course, the sample COULD be unrepresentative, but that's not what (E) says. (E) suggests the sample IS unrepresentative, and thus we can't select that as a definite flaw.

On the other hand, (D) IS an assumption that the author makes, and is therefore the correct answer.

The subtlety here is about choosing an answer that we KNOW is a flaw rather than an answer that is merely a POSSIBLE flaw.

HTH

- Chris




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