GMAT Changed on April 16th - Read about the latest changes here

It is currently 23 Apr 2018, 20:29

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Tennis racket strings often go "dead" – become less responsive and

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

Hide Tags

Manager
Manager
User avatar
G
Joined: 04 Nov 2017
Posts: 223
Location: United States
Premium Member CAT Tests
Tennis racket strings often go "dead" – become less responsive and [#permalink]

Show Tags

New post 30 Dec 2017, 22:43
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

78% (01:15) correct 22% (00:55) wrong based on 90 sessions

HideShow timer Statistics

Tennis racket strings often go "dead" – become less responsive and shock absorbent – after a few weeks of intense use. A researcher whose son is a professional tennis player hypothesized that dirt and sweat, rather than changes in the material properties of the string, were responsible.

Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher's hypothesis?

A. Determining if a synthetic fiber is used to make the strings used by tennis pros.
B. Determining whether doubles players make their strings go dead faster than do singles players.
C. Determining whether identical lengths of string, of the same type, go dead at different rates when strung on various brands of rackets.
D. Determining whether a dead string and a new string strike the ball in different ways.
E. Determining whether smearing various substances on new tennis strings causes them to go dead.
[Reveal] Spoiler: OA

_________________

Please +1 Kudos

“Learning is a treasure that will follow its owner everywhere.”

1 KUDOS received
VP
VP
User avatar
D
Joined: 28 Mar 2017
Posts: 1000
Location: India
Concentration: Finance, Technology
GMAT 1: 730 Q49 V41
GPA: 4
Re: Tennis racket strings often go "dead" – become less responsive and [#permalink]

Show Tags

New post 06 Jan 2018, 14:23
1
This post received
KUDOS
Tennis racket strings often go "dead" – become less responsive and shock absorbent – after a few weeks of intense use. A researcher whose son is a professional tennis player hypothesized that dirt and sweat, rather than changes in the material properties of the string, were responsible.

Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher's hypothesis?

A. Determining if a synthetic fiber is used to make the strings used by tennis pros. -We need to find whether dirt and sweat are responsible for the changes. We already know material used to make the strings is not responsible for dead strings.
B. Determining whether doubles players make their strings go dead faster than do singles players. -Out of scope
C. Determining whether identical lengths of string, of the same type, go dead at different rates when strung on various brands of rackets. -Out of scope
D. Determining whether a dead string and a new string strike the ball in different ways. -Out of scope
E. Determining whether smearing various substances on new tennis strings causes them to go dead. -Correct. If dirt and sweat make a string dead then it strengthens the argument, else it weakens the argument.
_________________

Kudos if my post helps!

Long And A Fruitful Journey - V21 to V41; If I can, So Can You!!


My study resources:
1. Useful Formulae, Concepts and Tricks-Quant
2. e-GMAT's ALL SC Compilation
3. LSAT RC compilation
4. Actual LSAT CR collection by Broal
5. QOTD RC (Carcass)
6. Challange OG RC
7. GMAT Prep Challenge RC

Manager
Manager
User avatar
B
Joined: 06 Sep 2016
Posts: 140
Location: Italy
Schools: EDHEC (A)
GMAT 1: 650 Q43 V37
GPA: 3.2
WE: General Management (Human Resources)
Premium Member
Re: Tennis racket strings often go "dead" – become less responsive and [#permalink]

Show Tags

New post 09 Jan 2018, 11:56
Mmmm I know that comes from Kaplan but I am not very satisfied with the OA.
"Various substances" can mean everything, even sulphuric acid! That is not comparable with the sweat and dirt found in a tennis court.
The answer B for me is the best one: a racket of a double tennis player is exposed to the same level of dirt and sweat but not the same level of stress because the two players "switch", and so comparing the strings would be very effective!
Tell me if you agree with my toughts :-)
Manager
Manager
User avatar
S
Joined: 20 Feb 2017
Posts: 91
Location: United States
Premium Member CAT Tests
Re: Tennis racket strings often go "dead" – become less responsive and [#permalink]

Show Tags

New post 10 Jan 2018, 19:10
MvArrow wrote:
Mmmm I know that comes from Kaplan but I am not very satisfied with the OA.
"Various substances" can mean everything, even sulphuric acid! That is not comparable with the sweat and dirt found in a tennis court.on
The answer B for me is the best one: a racket of a double tennis player is exposed to the same level of dirt and sweat but not the same level of stress because the two players "switch", and so comparing the strings would be very effective!
Tell me if you agree with my toughts :-)

IMO

Option E will provide you most significant information to prove/disprove the stem. Option B will add too many other variables before we make any conclusion.
_________________

*****************************************************************
Kudos are always welcome.

Senior Manager
Senior Manager
User avatar
G
Joined: 09 Mar 2017
Posts: 383
Location: India
Concentration: Marketing, Organizational Behavior
WE: Information Technology (Computer Software)
Tennis racket strings often go "dead" – become less responsive and [#permalink]

Show Tags

New post 10 Jan 2018, 21:06
MvArrow wrote:
Mmmm I know that comes from Kaplan but I am not very satisfied with the OA.
"Various substances" can mean everything, even sulphuric acid! That is not comparable with the sweat and dirt found in a tennis court.
The answer B for me is the best one: a racket of a double tennis player is exposed to the same level of dirt and sweat but not the same level of stress because the two players "switch", and so comparing the strings would be very effective!
Tell me if you agree with my toughts :-)


I too have had the same reasoning for B. But later, after rereading the premise I noticed that the comparison is between the dirt level and properties of the string, not the intensity. In B the two rackets can reasonably be assumed to be comprising identical strings and hence, identical properties.

Premise: Tennis racket strings often go "dead" – become less responsive and shock absorbent – after a few weeks of intense use. A researcher whose son is a professional tennis player hypothesized that dirt and sweat, rather than changes in the material properties of the string, were responsible.

B is exploiting the orange part, where as we need to focus on the green part.E presents a striking evidence of dirt keeping the properties same.

Hope this helps.
_________________

------------------------------
"Trust the timing of your life"
Hit Kudus if this has helped you get closer to your goal, and also to assist others save time. Tq :)

Tennis racket strings often go "dead" – become less responsive and   [#permalink] 10 Jan 2018, 21:06
Display posts from previous: Sort by

Tennis racket strings often go "dead" – become less responsive and

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.