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

 It is currently 24 May 2018, 12:35

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

Which of the following can be inferred from the data above?

Author Message
TAGS:

Hide Tags

Manager
Joined: 18 Oct 2013
Posts: 77
Location: India
Concentration: Technology, Finance
GMAT 1: 580 Q48 V21
GMAT 2: 530 Q49 V13
GMAT 3: 590 Q49 V21
WE: Information Technology (Computer Software)
Which of the following can be inferred from the data above? [#permalink]

Show Tags

Updated on: 14 Jul 2014, 03:16
3
KUDOS
10
This post was
BOOKMARKED
00:00

Difficulty:

65% (hard)

Question Stats:

61% (01:16) correct 39% (01:16) wrong based on 495 sessions

HideShow timer Statistics

Attachment:

GMAT.png [ 27.6 KiB | Viewed 17575 times ]
Which of the following statements can be inferred from the data above?

I. The Klein family's annual income more than doubled from 1985 to 1995.
II. The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
III. The Klein family's average (arithmetic mean) annual income for the period shown was greater than $40,000. A. I only B. II only C. I and III only D. II and III only E. I, II, and III Hi This is an GMAT Prep Question.Please let me know the correct answer and why it correct? Moreover, why We cannot infer II from the data above? Originally posted by vikrantgulia on 31 Dec 2013, 02:01. Last edited by Bunuel on 14 Jul 2014, 03:16, edited 1 time in total. Edited the question. Senior Manager Status: Final Lap Joined: 25 Oct 2012 Posts: 270 Concentration: General Management, Entrepreneurship GPA: 3.54 WE: Project Management (Retail Banking) Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 31 Dec 2013, 04:36 vikrantgulia wrote: Hi This is an GMAT Prep Question.Please let me know the correct answer and why it correct? Moreover, why We cannot infer II from the data above? Hi there, The answer IMO is C : Statements I and III must be true according to the figure above I- The klein family's annual income more than doubled from 1985 to 1995 : True, In 1985 it was$25K while in 1995 it was more than $60K II- The klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995 That is not true because the annual income increased by approximately$15K from 1985 to 1990 while it increased by approximately $20K from 1990 to 1995 Notice that these values are obtained by substracting the value of the annual income of the latter year from that of the former III- The klein family's average (arithmetic mean) annual income for the period shown was greater than$ 40K.
Ok, lets see:
(25 + 25 + 25 + 35 + 35 + 40 + 40 + 55 + 60 + 60 +60) / 11 = 41,8 SO , that is true .
_________________

KUDOS is the good manner to help the entire community.

Intern
Joined: 03 May 2014
Posts: 1
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

13 Jul 2014, 17:03
For III - Since the data is for 11 consecutive years, why can't you consider year 6 (1990) as the mean? If you do, the annual income appears to be right under $40,000. Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8077 Location: Pune, India Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 14 Jul 2014, 02:32 7 This post received KUDOS Expert's post 1 This post was BOOKMARKED dolphinitida wrote: For III - Since the data is for 11 consecutive years, why can't you consider year 6 (1990) as the mean? If you do, the annual income appears to be right under$40,000.

What you are talking about is the median. Year 6 will give you the median income. The mean needn't lie at the middle value.
Say, for a set of numbers 4, 5, 5, 6, 7, 20, 22, mean will not be 6 (the middle value). Median will be 6 but mean will be much higher.

Another way to analyze statement III is this:

First 3 points are at most 15000 less than 40,000.
Next 4 points are almost 40,000 each.
The next point is at least 15,000 more than 40,000
The next 3 points are at least 20,000 more than 40,000.

So overall, the distance of the points higher than 40,000 is more than the distance of the points lower than 40,000. This is just your deviation concept applied visually.

For more on deviation, check: http://www.veritasprep.com/blog/2012/05 ... eviations/
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews VP Joined: 09 Jun 2010 Posts: 1196 Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 02 May 2015, 07:45 this question require us to approximate. not easy. but if you practice often, it would be easy _________________ visit my facebook to help me. on facebook, my name is: thang thang thang Intern Joined: 13 Jul 2015 Posts: 37 Location: Singapore GMAT 1: 730 Q50 V39 WE: Operations (Investment Banking) Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 01 Oct 2015, 00:37 vikrantgulia wrote: Attachment: GMAT.png Which of the following statements can be inferred from the data above? I. The Klein family's annual income more than doubled from 1985 to 1995. II. The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995. III. The Klein family's average (arithmetic mean) annual income for the period shown was greater than$40,000.

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

Hi
This is an GMAT Prep Question.Please let me know the correct answer and why it correct?
Moreover, why We cannot infer II from the data above?

Bunuel, could you comment if this is an actual GMATPrep Quant question or an IR question?
EMPOWERgmat Instructor
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 11663
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: 340 Q170 V170
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

01 Oct 2015, 16:36
Hi SamuelWitwicky,

Most Test Takers see 1 question in the Quant section that involves a complex-looking chart, graph or table; the prompt is usually more complex than an 'average' question and takes the better part of 3 minutes to solve. Thus, this type of question COULD show up in your Quant section (but you won't see many of them).

As complex as the prompt looks, very little actual math is required to solve it. Some general estimation and pattern-matching will get you the correct answer.

GMAT assassins aren't born, they're made,
Rich
_________________

760+: Learn What GMAT Assassins Do to Score at the Highest Levels
Contact Rich at: Rich.C@empowergmat.com

Rich Cohen

Co-Founder & GMAT Assassin

Special Offer: Save $75 + GMAT Club Tests Free Official GMAT Exam Packs + 70 Pt. Improvement Guarantee www.empowergmat.com/ ***********************Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!*********************** Intern Joined: 13 Jul 2015 Posts: 37 Location: Singapore GMAT 1: 730 Q50 V39 WE: Operations (Investment Banking) Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 01 Oct 2015, 19:04 EMPOWERgmatRichC wrote: Hi SamuelWitwicky, Most Test Takers see 1 question in the Quant section that involves a complex-looking chart, graph or table; the prompt is usually more complex than an 'average' question and takes the better part of 3 minutes to solve. Thus, this type of question COULD show up in your Quant section (but you won't see many of them). As complex as the prompt looks, very little actual math is required to solve it. Some general estimation and pattern-matching will get you the correct answer. GMAT assassins aren't born, they're made, Rich Hey thanks for the reply. ok if that is so, i'd like to understand the wording of the question so that I don't make the same mistake again. The question stem states, which of the following can be inferred from the graph right? I feel statement II can be inferred to be wrong from the graph. And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No. Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8077 Location: Pune, India Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 01 Oct 2015, 19:32 2 This post received KUDOS Expert's post SamuelWitwicky wrote: I feel statement II can be inferred to be wrong from the graph. And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No. There is a difference: Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995. If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only. On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995? When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle) This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Intern
Joined: 13 Jul 2015
Posts: 37
Location: Singapore
GMAT 1: 730 Q50 V39
WE: Operations (Investment Banking)
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

01 Oct 2015, 19:50
VeritasPrepKarishma wrote:
SamuelWitwicky wrote:
I feel statement II can be inferred to be wrong from the graph.

And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No.

There is a difference:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.

ok got it! thanks a lot Karishma
Retired Moderator
Joined: 29 Oct 2013
Posts: 272
Concentration: Finance
GPA: 3.7
WE: Corporate Finance (Retail Banking)
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

26 Dec 2015, 00:16
Rock750 wrote:
vikrantgulia wrote:
Ok, lets see:
(25 + 25 + 25 + 35 + 35 + 40 + 40 + 55 + 60 + 60 +60) / 11 = 41,8 SO , that is true .

How did you take last three numbers as 60. they look more close to 65 to me. Deciding the xact values make me waste a lot of time on these questions. Any help will be much appreciated. Thanks
_________________

My journey V46 and 750 -> http://gmatclub.com/forum/my-journey-to-46-on-verbal-750overall-171722.html#p1367876

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8077
Location: Pune, India
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

27 Dec 2015, 20:43
1
KUDOS
Expert's post
NoHalfMeasures wrote:
Rock750 wrote:
vikrantgulia wrote:
Ok, lets see:
(25 + 25 + 25 + 35 + 35 + 40 + 40 + 55 + 60 + 60 +60) / 11 = 41,8 SO , that is true .

How did you take last three numbers as 60. they look more close to 65 to me. Deciding the xact values make me waste a lot of time on these questions. Any help will be much appreciated. Thanks

Use the deviation method I have discussed above.

If you do want to take values, take approximate values:
25, 26, 26, 35, 36, 38, 38, 56, 63, 63, 63

Mind you, the average you will get will not be very close to 40 so a few points here and there on your approximation will make no difference.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Intern Joined: 29 Nov 2015 Posts: 13 Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 29 Dec 2015, 11:31 VeritasPrepKarishma wrote: SamuelWitwicky wrote: I feel statement II can be inferred to be wrong from the graph. And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No. There is a difference: Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995. If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only. On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995? When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle) This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it. So just to be sure, in PS and DS, when the question asks 'can you infer...' it means can you get an exact value of this (true/false, yes/no, etc)? But in IR, when the question asks 'can you infer...' it means is there sufficient information provided in the paragraphs and tables for you to ARRIVE at an answer or DEDUCE an answer? Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8077 Location: Pune, India Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 29 Dec 2015, 21:48 2 This post received KUDOS Expert's post sarathvr wrote: VeritasPrepKarishma wrote: SamuelWitwicky wrote: I feel statement II can be inferred to be wrong from the graph. And this is exactly how IR always asks the questions. Can the following be inferred? Yes or No. There is a difference: Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995. If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true only. On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995? When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle) This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it. So just to be sure, in PS and DS, when the question asks 'can you infer...' it means can you get an exact value of this (true/false, yes/no, etc)? But in IR, when the question asks 'can you infer...' it means is there sufficient information provided in the paragraphs and tables for you to ARRIVE at an answer or DEDUCE an answer? No, the difference does not lie in whether the question is asked in PS/DS or IR. The difference lies in the way the question is asked. Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995. This is a statement. To infer it, it needs to be true. If this is not true, you say that you cannot infer this from the graph. On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995? When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8077
Location: Pune, India
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

21 Nov 2016, 08:23
Responding to a pm:
Quote:
For this particular question (URL link above), I chose Option E as I can infer all the statements, two of which(I and III) are right and one (II) is false.
Kindly explain where am I going wrong?

You cannot infer statement II. Here is why:

Can you infer that: The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.
If this is not true, you say that you cannot infer this from the graph. This is a statement and to be inferred, it needs to be true ONLY.

On the other hand: Did the Klein family's annual income increase by a greater amount from 1985 to 1990 than from 1990 to 1995?
When it is a question, you can answer with a Yes or No. Both answers are acceptable. The only answer not acceptable is may be. (your basic DS principle)

This question is asking about a statement and whether you can infer that. If the statement is correct, only then you can infer it.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Intern Joined: 30 Aug 2016 Posts: 5 Location: Italy Schools: HEC Dec"18 (I) GMAT 1: 700 Q47 V41 GPA: 3.83 Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 03 Jan 2017, 11:18 Just a quick note Once you realized that I. must be true and II. must not, then you can ignore statement III. and directly mark C: C is the only answer in which I. is true and II. is not! Intern Joined: 05 Oct 2016 Posts: 10 Location: India GMAT 1: 600 Q50 V30 GMAT 2: 600 Q50 V30 GMAT 3: 600 Q50 V30 GPA: 3.4 Re: Which of the following can be inferred from the data above? [#permalink] Show Tags 16 Feb 2017, 08:29 VeritasPrepKarishma wrote: dolphinitida wrote: For III - Since the data is for 11 consecutive years, why can't you consider year 6 (1990) as the mean? If you do, the annual income appears to be right under$40,000.

What you are talking about is the median. Year 6 will give you the median income. The mean needn't lie at the middle value.
Say, for a set of numbers 4, 5, 5, 6, 7, 20, 22, mean will not be 6 (the middle value). Median will be 6 but mean will be much higher.

Another way to analyze statement III is this:

First 3 points are at most 15000 less than 40,000.
Next 4 points are almost 40,000 each.
The next point is at least 15,000 more than 40,000
The next 3 points are at least 20,000 more than 40,000.

So overall, the distance of the points higher than 40,000 is more than the distance of the points lower than 40,000. This is just your deviation concept applied visually.

For more on deviation, check: http://www.veritasprep.com/blog/2012/05 ... eviations/

this saves a lot of time. i kept addiing all the values and calculating average, eating lot of time
thanks for the post
_________________

success is the best revenge

Manager
Joined: 30 Jul 2014
Posts: 145
GPA: 3.72
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

07 Mar 2018, 06:02
I did a calculation mistake while evaluating statement 3 - marked answer A as option. Learning: I should not do calculation in mind, rather I should actually write calculations in a piece of paper.
_________________

A lot needs to be learned from all of you.

Manager
Joined: 23 May 2017
Posts: 226
Concentration: Finance, Accounting
WE: Programming (Energy and Utilities)
Re: Which of the following can be inferred from the data above? [#permalink]

Show Tags

07 Mar 2018, 06:46
11 data points : Income in 1000
85 -> 25
86 -> 26
87 -> 26
88 -> 35
89 -> 40
90 -> 44
91 -> 44
92 -> 58
93 -> 64
94 -> 64
95 -> 64

I. The Klein family's annual income more than doubled from 1985 to 1995.
Income in 95 = 64 which is more than twice of 25 ( income from 85 ) - True : B, D are out

II. The Klein family's annual income increased by a greater amount from 1985 to 1990 than from 1990 to 1995.

90 - 85 = 44 - 25 = 19
95 - 90 = 64 - 44 = 20

so 19 > 20 - No So E is out

III. The Klein family's average (arithmetic mean) annual income for the period shown was greater than \$40,000.

to find average - Let's divide data points by 11 directly rather than summing and then dividing by 11
$$\frac{25}{11}$$ + $$\frac{26}{11}$$ + $$\frac{26}{11}$$ + $$\frac{35}{11}$$ + $$\frac{40}{11}$$ +
$$\frac{44}{11}$$ + $$\frac{44}{11}$$ + $$\frac{58}{11}$$ + $$\frac{64}{11}$$ + $$\frac{64}{11}$$ +
$$\frac{64}{11}$$

= 2 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5 + 5 + 5 [ just taking integer values ]
= 8 + 10 + 9 + 15
= 18 + 24
= 42 > 40 hence answer = C

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III
_________________

If you like the post, please award me Kudos!! It motivates me

Re: Which of the following can be inferred from the data above?   [#permalink] 07 Mar 2018, 06:46
Display posts from previous: Sort by