Last visit was: 21 Nov 2024, 17:45 It is currently 21 Nov 2024, 17:45

Close

GRE Prep 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 GRE 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
Verbal Expert
Joined: 18 Apr 2015
Posts: 30003
Own Kudos [?]: 36341 [5]
Given Kudos: 25927
Send PM
Most Helpful Community Reply
avatar
Manager
Manager
Joined: 22 Jan 2020
Posts: 120
Own Kudos [?]: 240 [6]
Given Kudos: 10
Send PM
General Discussion
avatar
Manager
Manager
Joined: 19 Jan 2020
Posts: 56
Own Kudos [?]: 67 [0]
Given Kudos: 0
Send PM
User avatar
Senior Manager
Senior Manager
Joined: 10 Feb 2020
Posts: 496
Own Kudos [?]: 349 [0]
Given Kudos: 299
Send PM
Re: The U.S. Weather Bureau has provided the following informati [#permalink]
Any other explanation?
Manager
Manager
Joined: 23 May 2021
Posts: 146
Own Kudos [?]: 45 [0]
Given Kudos: 23
Send PM
Re: The U.S. Weather Bureau has provided the following informati [#permalink]
Isnt the median here , the median of two numbers? Or am i wrong?
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Own Kudos [?]: 3224 [1]
Given Kudos: 172
Location: India
WE:Education (Education)
Send PM
Re: The U.S. Weather Bureau has provided the following informati [#permalink]
1
Explanation:

To find the mean, let us first arrange these 20 terms in ascending order:
464, 505, 564, 585, 604, 608, 616, 653, 657, 660, 697, 704, 741, 856, 888, 906, 918, 926, 947, 1102

Median (for even number of terms) = \(\frac{10^{th} term + 11^{th} term}{2} = \frac{660 + 697}{2} = 678.5\)

Average (given) = 730
SD (given) = 168
1SD of mean means 1SD above or 1SD below mean i.e. (730 - 168) to (730 + 168) = 562 to 898

Find the numbers which are less than the median;
464, 505, 564, 585, 604, 608, 616, 653, 657, 660

Which are not within one standard deviation of the mean;
464, 505, 564, 585, 604, 608, 616, 653, 657, 660

Required probability = \(\frac{2}{20} (100) = 10\)%
Hence, option A
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5030
Own Kudos [?]: 74 [0]
Given Kudos: 0
Send PM
Re: The U.S. Weather Bureau has provided the following informati [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: The U.S. Weather Bureau has provided the following informati [#permalink]
Moderators:
GRE Instructor
84 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

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