Expert witness: Ten times, and in controlled circumstances, : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 20 Jan 2017, 18:55

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Expert witness: Ten times, and in controlled circumstances,

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Director
Joined: 14 Jul 2004
Posts: 700
Followers: 1

Kudos [?]: 42 [0], given: 0

Expert witness: Ten times, and in controlled circumstances, [#permalink]

### Show Tags

15 Sep 2005, 18:03
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

Expert witness: Ten times, and in controlled circumstances, a single drop of the defendant's blood was allowed to fall onto the fabric. And in all ten cases, the stained area was much less than the expected 9.5 cm2. In fact, the stained area was always between 4.5 and 4.8 cm2. I conclude that a single drop of the defendant's blood stains much less than 9.5 cm2 of the fabric.

Which one of the following, if true, most undermines the value of the evidence for the expert witness's conclusion?

A) If similiar results had been found after 100 test drops of the defendant's blood, the evidence would be even stronger.
B) Expert witness have sometimes been known to fudge their data to accord with the prosecution's case.
C) In an eleventh test drop of the defendant's blood, the area stained was also less than 9.5 cm2 - this time staining 9.3 cm2.
D) Another person's blood was substituted, and in otherwide indentical circumstances, stained between 9.8 and 10.6 cms2 of the fabric.
E) Not all expert witnesses are the authorities in their fields that they claim to be.
If you have any questions
you can ask an expert
New!
Director
Joined: 23 Jun 2005
Posts: 847
GMAT 1: 740 Q48 V42
Followers: 5

Kudos [?]: 70 [0], given: 1

### Show Tags

15 Sep 2005, 18:18
C is my choice. Shows the variability in the results.
A only corroborates.
B not relevant
D no comparison between another person's blood and the defendants.
E not relevant
Director
Joined: 14 Sep 2005
Posts: 993
Location: South Korea
Followers: 2

Kudos [?]: 155 [0], given: 0

### Show Tags

15 Sep 2005, 19:19
Good explanation, anandsebastin.
I agree, (C)
Senior Manager
Joined: 15 Aug 2005
Posts: 257
Location: Las Vegas, NV
Followers: 2

Kudos [?]: 4 [0], given: 0

### Show Tags

16 Sep 2005, 08:00
Yeah, I got down to A and C on this one and took C. A doesn't hurt the argument as much as C does. C shows that the stain isn't substantially less than 9.5 and draws the expert's results into question.
Director
Joined: 15 Aug 2005
Posts: 798
Location: Singapore
Followers: 2

Kudos [?]: 55 [0], given: 0

### Show Tags

16 Sep 2005, 20:10
This is a clear C!
The word to look out for is Much less than!
C proves that wrong!
_________________

Cheers, Rahul.

Manager
Joined: 15 Aug 2005
Posts: 179
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

17 Sep 2005, 01:13
Between B and C, I wud choose B.
I dont think B, here, is irrelavant. Assume B to be true and say, if this witness aslo falls in that category, then the entire logic can be outrightly discarded.

OA/OE Plz.
Krishna
Senior Manager
Joined: 13 Jan 2005
Posts: 331
Followers: 1

Kudos [?]: 2 [0], given: 12

### Show Tags

19 Sep 2005, 09:05
IMO its a clear C. Shows variability.

GA
Director
Joined: 09 Jul 2005
Posts: 595
Followers: 2

Kudos [?]: 57 [0], given: 0

### Show Tags

19 Sep 2005, 13:45
Clearly C[/b]
Director
Joined: 04 Jul 2004
Posts: 904
Followers: 4

Kudos [?]: 51 [0], given: 0

### Show Tags

19 Sep 2005, 15:23
Agree with (C). Result of 11th drop clears opposes the conclusion.
VP
Joined: 20 Sep 2005
Posts: 1021
Followers: 3

Kudos [?]: 35 [0], given: 0

### Show Tags

20 Sep 2005, 16:20
pretty straight forward...C.
SVP
Joined: 28 May 2005
Posts: 1723
Location: Dhaka
Followers: 7

Kudos [?]: 327 [0], given: 0

### Show Tags

23 Sep 2005, 14:58
Clear C.
_________________

hey ya......

SVP
Joined: 28 May 2005
Posts: 1723
Location: Dhaka
Followers: 7

Kudos [?]: 327 [0], given: 0

### Show Tags

30 Sep 2005, 14:05
_________________

hey ya......

Senior Manager
Joined: 29 Oct 2008
Posts: 410
Location: United States
Concentration: Marketing, Technology
Followers: 9

Kudos [?]: 272 [0], given: 34

### Show Tags

27 Dec 2013, 13:30
nakib77 wrote:
OA is C.
First things first. Any option with some in weakener question is considered a bad choice. By this, E and B becomes bad choices for weaken question. If you are surprised with E being qualified for Some, please note that "Not All" means not 100% and I have made a little adjustment while comparing "Not All" to "Some". Since, both "Not All" and "Some" can refer to a sample size of as less as 1% of sample, weakening options with these qualifiers are considered weak weakeners and are mostly distractions in weaken questions.
"Not All" covers 0% to 99% sample
"Some" covers 1% to 100% of sample

A is a strengthener as it supports the case in the event of further investigation. D is irrelevant leaving C as winner.
What we have to understand is that
1) if 11th drop came increasingly near to 9.3 cm2, then 12th may become 9.8cm2 and thus destroy conclusion.
2) Conclusion says MUCH LESS. This is not the case with 9.3cm2

Some related good explanations are also at this link: http://www.manhattanlsat.com/forums/q17 ... t4840.html
_________________

If you know what you're worth, then go out and get what you're worth. But you gotta be willing to take the hits, and not pointing fingers saying you ain't where you wanna be because of anybody! Cowards do that and You're better than that!
The path is long, but self-surrender makes it short; the way is difficult, but perfect trust makes it easy.

Fire the final bullet only when you are constantly hitting the Bull's eye, till then KEEP PRACTICING.
Failure establishes only this, that our determination to succeed was not strong enough.
Getting defeated is just a temporary notion, giving it up is what makes it permanent.

http://gmatclub.com/forum/1000-sc-notes-at-one-place-in-one-document-with-best-of-explanations-192961.html

Press +1 Kudos, if you think my post gave u a tiny tip.

Re:   [#permalink] 27 Dec 2013, 13:30
Similar topics Replies Last post
Similar
Topics:
9 marketing expert 4 29 Apr 2015, 10:37
11 The last century has witnessed a shortening of the average 4 29 Jul 2014, 07:38
2 As part of continuing efforts to control illegal 29 12 Dec 2008, 07:16
Some people believe that witnessing violence in movies will 3 01 Feb 2008, 00:26
The program to control the entry of illegal drugs into the 8 12 Apr 2007, 17:13
Display posts from previous: Sort by

# Expert witness: Ten times, and in controlled circumstances,

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.