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After preparing the results of their measurement of the
[#permalink]
09 Dec 2017, 19:24

Expert Reply

Question Stats:

After preparing the results of their measurement of the weight of children that participated in their pediatric study, Steph’s graduate assistant spilled coffee on their papers. If Steph is able to read that 50 lbs is the third standard deviation to the left of the mean, and 110 lbs also falls on a standard deviation, then which of the following could be the mean weight of the children in the study, assuming regular distribution?

Indicate all possible values.

A. 80

B. 85

C. 86

D. 95

E. 100

_________________

Indicate all possible values.

A. 80

B. 85

C. 86

D. 95

E. 100

Show: :: OA

A, C, D

Drill 4

Question: 1

Page: 531

Question: 1

Page: 531

_________________

Sandy

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If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Retired Moderator

Joined: **07 Jun 2014 **

Posts: **4804**

WE:**Business Development (Energy and Utilities)**

Re: After preparing the results of their measurement of the
[#permalink]
29 Dec 2017, 15:35

2

Expert Reply

Explanation

Draw a bell curve with three standard deviations to the left and the right of mean.

Plug in 50 lbs on the leftmost standard deviation as mentioned in the question. Start with choice (A), plug in 80 lbs for the mean, and solve for the standard deviation. In this case it would be 10, and it’s possible to see that 110 would be the third standard deviation to the right of the mean.

Therefore, choice (A) satisfies the question. If you repeat this with choice (B), you’ll find that the standard deviation would have to be 11.67. Thus, the value two standard deviations to the right of the mean is 108, and is just shy of what you want.

In choice (C), the mean is 86, the standard deviation is 12, and 110 will be the second deviation to the right of the mean.

Choice (D) works; the mean is 95, standard deviation is 15, and 120 is the first value to the right of the mean. You can Ballpark to eliminate choice (E). Its standard deviation is about 16, and the first standard deviation to the right would be about 116, which means 110 cannot fall on a standard deviation.

_________________

Sandy

If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Draw a bell curve with three standard deviations to the left and the right of mean.

Plug in 50 lbs on the leftmost standard deviation as mentioned in the question. Start with choice (A), plug in 80 lbs for the mean, and solve for the standard deviation. In this case it would be 10, and it’s possible to see that 110 would be the third standard deviation to the right of the mean.

Therefore, choice (A) satisfies the question. If you repeat this with choice (B), you’ll find that the standard deviation would have to be 11.67. Thus, the value two standard deviations to the right of the mean is 108, and is just shy of what you want.

In choice (C), the mean is 86, the standard deviation is 12, and 110 will be the second deviation to the right of the mean.

Choice (D) works; the mean is 95, standard deviation is 15, and 120 is the first value to the right of the mean. You can Ballpark to eliminate choice (E). Its standard deviation is about 16, and the first standard deviation to the right would be about 116, which means 110 cannot fall on a standard deviation.

_________________

If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: After preparing the results of their measurement of the
[#permalink]
28 Sep 2019, 05:54

""110 lbs also falls on a standard deviation""............. If you Understand This, The problem will be easy to solve. It does not mean that 110 is within 1 standard deviation. It just says that 110 is in a standard deviation point, it may be 1 SD, 2 SD etc. So, It is better to combat this math with the answers given.

_________________

_________________

Regards

Mostofa Wahid

Mostofa Wahid

Re: After preparing the results of their measurement of the
[#permalink]
30 Oct 2019, 20:46

Draw a bell curve with three standard deviations to the left and the right of mean.

Plug in 50 lbs on the leftmost standard deviation as mentioned in the question. Start with choice (A), plug in 80 lbs for the mean, and solve for the standard deviation. In this case it would be 10, and it’s possible to see that 110 would be the third standard deviation to the right of the mean.

Therefore, choice (A) satisfies the question. If you repeat this with choice (B), you’ll find that the standard deviation would have to be 11.67. Thus, the value two standard deviations to the right of the mean is 108, and is just shy of what you want.

In choice (C), the mean is 86, the standard deviation is 12, and 110 will be the second deviation to the right of the mean.

Choice (D) works; the mean is 95, standard deviation is 15, and 120 is the first value to the right of the mean. You can Ballpark to eliminate choice (E). Its standard deviation is about 16, and the first standard deviation to the right would be about 116, which means 110 cannot fall on a standard deviation.

_________________

Plug in 50 lbs on the leftmost standard deviation as mentioned in the question. Start with choice (A), plug in 80 lbs for the mean, and solve for the standard deviation. In this case it would be 10, and it’s possible to see that 110 would be the third standard deviation to the right of the mean.

Therefore, choice (A) satisfies the question. If you repeat this with choice (B), you’ll find that the standard deviation would have to be 11.67. Thus, the value two standard deviations to the right of the mean is 108, and is just shy of what you want.

In choice (C), the mean is 86, the standard deviation is 12, and 110 will be the second deviation to the right of the mean.

Choice (D) works; the mean is 95, standard deviation is 15, and 120 is the first value to the right of the mean. You can Ballpark to eliminate choice (E). Its standard deviation is about 16, and the first standard deviation to the right would be about 116, which means 110 cannot fall on a standard deviation.

_________________

Re: After preparing the results of their measurement of the
[#permalink]
30 Jun 2020, 01:25

sandy wrote:

After preparing the results of their measurement of the weight of children that participated in their pediatric study, Steph’s graduate assistant spilled coffee on their papers. If Steph is able to read that 50 lbs is the third standard deviation to the left of the mean, and 110 lbs also falls on a standard deviation, then which of the following could be the mean weight of the children in the study, assuming regular distribution?

Indicate all possible values.

A. 80

B. 85

C. 86

D. 95

E. 100

Indicate all possible values.

A. 80

B. 85

C. 86

D. 95

E. 100

Show: :: OA

A, C, D

Drill 4

Question: 1

Page: 531

Question: 1

Page: 531

do such questions come on a GRE general exam? or only mathematics?

Re: After preparing the results of their measurement of the
[#permalink]
30 Jun 2020, 02:40

Expert Reply

What do you mean "it comes from the GRE or only math ??

Has no sense your reply

_________________

Has no sense your reply

_________________

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ETS: ETS Free PowerPrep 1 & 2 All 320 Questions Explanation. | ETS All Official Guides

3rd Party Resource's: All Quant Questions Collection | All Verbal Questions Collection

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Scores: The GRE average score at Top 25 Business Schools 2020 Ed. | How to study for GRE retake and score HIGHER - (2020)

How is the GRE Score Calculated -The Definitive Guide (2021)

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Vocab: GRE Prep Club Official Vocabulary Lists for the GRE (2021)

Re: After preparing the results of their measurement of the
[#permalink]
30 Jun 2020, 02:41

1

Carcass wrote:

What do you mean "it comes from the GRE or only math ??

Has no sense your reply

Has no sense your reply

I meant there is the GRE general exam, and the GRE math subject test.

such question, does it come in the general exam?

Re: After preparing the results of their measurement of the
[#permalink]
30 Jun 2020, 02:46

Expert Reply

Ok. Now is more way clear

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

_________________

New to the GRE, and GRE CLUB Forum?

GRE: All you do need to know about the GRE Test | GRE Prep Club for the GRE Exam - The Complete FAQ

Search GRE Specific Questions | Download Vault

Posting Rules: QUANTITATIVE | VERBAL

FREE Resources: GRE Prep Club Official LinkTree Page | Free GRE Materials - Where to get it!! (2020)

Free GRE Prep Club Tests: Got 20 Kudos? You can get Free GRE Prep Club Tests

GRE Prep Club on : Facebook | Instagram

Questions' Banks and Collection:

ETS: ETS Free PowerPrep 1 & 2 All 320 Questions Explanation. | ETS All Official Guides

3rd Party Resource's: All Quant Questions Collection | All Verbal Questions Collection

Books: All GRE Best Books

Scores: The GRE average score at Top 25 Business Schools 2020 Ed. | How to study for GRE retake and score HIGHER - (2020)

How is the GRE Score Calculated -The Definitive Guide (2021)

Tests: GRE Prep Club Tests | FREE GRE Practice Tests [Collection] - New Edition (2021)

Vocab: GRE Prep Club Official Vocabulary Lists for the GRE (2021)

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

_________________

GRE: All you do need to know about the GRE Test | GRE Prep Club for the GRE Exam - The Complete FAQ

Search GRE Specific Questions | Download Vault

Posting Rules: QUANTITATIVE | VERBAL

FREE Resources: GRE Prep Club Official LinkTree Page | Free GRE Materials - Where to get it!! (2020)

Free GRE Prep Club Tests: Got 20 Kudos? You can get Free GRE Prep Club Tests

GRE Prep Club on : Facebook | Instagram

Questions' Banks and Collection:

ETS: ETS Free PowerPrep 1 & 2 All 320 Questions Explanation. | ETS All Official Guides

3rd Party Resource's: All Quant Questions Collection | All Verbal Questions Collection

Books: All GRE Best Books

Scores: The GRE average score at Top 25 Business Schools 2020 Ed. | How to study for GRE retake and score HIGHER - (2020)

How is the GRE Score Calculated -The Definitive Guide (2021)

Tests: GRE Prep Club Tests | FREE GRE Practice Tests [Collection] - New Edition (2021)

Vocab: GRE Prep Club Official Vocabulary Lists for the GRE (2021)

Re: After preparing the results of their measurement of the
[#permalink]
30 Jun 2020, 02:51

1

Carcass wrote:

Ok. Now is more way clear

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

THANK YOUUU

Re: After preparing the results of their measurement of the
[#permalink]
11 Jul 2020, 00:59

Hi Carcass, Please complete your GRE book I want to study Standard Deviation. Any link or theory of SD from your book you have?

_________________

Carcass wrote:

Ok. Now is more way clear

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

Our forum is dedicated to the GRE General exam. All the questions discussed both quant and verbal are meant to prepare for the GRE General exam

here about the GRE General exam https://greprepclub.com/forum/all-you-d ... -7924.html

Regards

_________________

Ever Tried? Ever Failed? No Matter. Try Again. Fail Again. Fail Better!!

Re: After preparing the results of their measurement of the
[#permalink]
11 Jul 2020, 01:12

1

Expert Reply

SD chapter https://greprepclub.com/forum/how-to-so ... tml#p53778

The book is completed

https://greprepclub.com/forum/greprepcl ... html#p5077

Regards

_________________

New to the GRE, and GRE CLUB Forum?

GRE: All you do need to know about the GRE Test | GRE Prep Club for the GRE Exam - The Complete FAQ

Search GRE Specific Questions | Download Vault

Posting Rules: QUANTITATIVE | VERBAL

FREE Resources: GRE Prep Club Official LinkTree Page | Free GRE Materials - Where to get it!! (2020)

Free GRE Prep Club Tests: Got 20 Kudos? You can get Free GRE Prep Club Tests

GRE Prep Club on : Facebook | Instagram

Questions' Banks and Collection:

ETS: ETS Free PowerPrep 1 & 2 All 320 Questions Explanation. | ETS All Official Guides

3rd Party Resource's: All Quant Questions Collection | All Verbal Questions Collection

Books: All GRE Best Books

Scores: The GRE average score at Top 25 Business Schools 2020 Ed. | How to study for GRE retake and score HIGHER - (2020)

How is the GRE Score Calculated -The Definitive Guide (2021)

Tests: GRE Prep Club Tests | FREE GRE Practice Tests [Collection] - New Edition (2021)

Vocab: GRE Prep Club Official Vocabulary Lists for the GRE (2021)

The book is completed

https://greprepclub.com/forum/greprepcl ... html#p5077

Regards

_________________

GRE: All you do need to know about the GRE Test | GRE Prep Club for the GRE Exam - The Complete FAQ

Search GRE Specific Questions | Download Vault

Posting Rules: QUANTITATIVE | VERBAL

FREE Resources: GRE Prep Club Official LinkTree Page | Free GRE Materials - Where to get it!! (2020)

Free GRE Prep Club Tests: Got 20 Kudos? You can get Free GRE Prep Club Tests

GRE Prep Club on : Facebook | Instagram

Questions' Banks and Collection:

ETS: ETS Free PowerPrep 1 & 2 All 320 Questions Explanation. | ETS All Official Guides

3rd Party Resource's: All Quant Questions Collection | All Verbal Questions Collection

Books: All GRE Best Books

Scores: The GRE average score at Top 25 Business Schools 2020 Ed. | How to study for GRE retake and score HIGHER - (2020)

How is the GRE Score Calculated -The Definitive Guide (2021)

Tests: GRE Prep Club Tests | FREE GRE Practice Tests [Collection] - New Edition (2021)

Vocab: GRE Prep Club Official Vocabulary Lists for the GRE (2021)

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