• Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • The Princeton Review
    FREE GMAT Exam
    Know how you'd score today for $0

    Available with Beat the GMAT members only code

    MORE DETAILS
    The Princeton Review
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors

In order to reduce classroom overcrowding

This topic has 1 expert reply and 0 member replies

In order to reduce classroom overcrowding

Post Sun Nov 05, 2017 1:11 pm
In order to reduce classroom overcrowding while maintaining academic standards,
Omega High School last year tested an online physics course with twenty volunteers
from the senior class. Although they met with the teacher once a week for lab work,
the students attended all lectures and did all their homework via remote computer.
All of the students in the online physics course easily passed the statewide physics
exam at the end of the school year. Administrators at the high school concluded from
this test that all students can learn effectively outside the classroom and decided that
Omega High School should offer all of its science courses online.

A. The science classrooms currently in use are bigger than the classrooms used for
other subjects.

B. The students who took the online physics course had access to the same science
library reference materials as the physics students who did not take the class online.

C. Omega High School has received a grant to purchase new computers for the next school year.

D. The students who enrolled in the online physics course were more self-motivated
than most students and were high achievers in the top ten percentile of their class.

E. There are excellent computer programs for teaching high school earth science,
biology and chemistry.

Which of the following, if true, would cast the most doubt on the conclusion drawn above? Can some experts help me find the best Option in this?

OA D

  • +1 Upvote Post
  • Quote
  • Flag

GMAT/MBA Expert

DavidG@VeritasPrep Legendary Member
Joined
14 Jan 2015
Posted:
2667 messages
Followed by:
120 members
Upvotes:
1153
GMAT Score:
770
Top Reply
Post Mon Nov 06, 2017 9:38 am
lheiannie07 wrote:
In order to reduce classroom overcrowding while maintaining academic standards,
Omega High School last year tested an online physics course with twenty volunteers
from the senior class. Although they met with the teacher once a week for lab work,
the students attended all lectures and did all their homework via remote computer.
All of the students in the online physics course easily passed the statewide physics
exam at the end of the school year. Administrators at the high school concluded from
this test that all students can learn effectively outside the classroom and decided that
Omega High School should offer all of its science courses online.

A. The science classrooms currently in use are bigger than the classrooms used for
other subjects.

B. The students who took the online physics course had access to the same science
library reference materials as the physics students who did not take the class online.

C. Omega High School has received a grant to purchase new computers for the next school year.

D. The students who enrolled in the online physics course were more self-motivated
than most students and were high achievers in the top ten percentile of their class.

E. There are excellent computer programs for teaching high school earth science,
biology and chemistry.

Which of the following, if true, would cast the most doubt on the conclusion drawn above? Can some experts help me find the best Option in this?

OA D
This is a causality argument. The conclusion is that the online class caused the students to pass the statewide exam. In condensed form:

Taking online class ---> pass exam

One way to weaken the argument is to find an alternative cause that could account for why all the students in the online class passed their exam. Say, for example, that because everyone in the online class volunteered to do so, this population of students was more motivated than students in a random sample would have been. This is what D gives us. If the students in this class were unusually motivated, then there's no reason to believe that this performance could be duplicated in an online class in which the participants were not self-selecting.

_________________
Veritas Prep | GMAT Instructor

Veritas Prep Reviews
Save $100 off any live Veritas Prep GMAT Course

  • +1 Upvote Post
  • Quote
  • Flag
Enroll in a Veritas Prep GMAT class completely for FREE. Wondering if a GMAT course is right for you? Attend the first class session of an actual GMAT course, either in-person or live online, and see for yourself why so many students choose to work with Veritas Prep. Find a class now!

Top First Responders*

1 GMATGuruNY 68 first replies
2 Rich.C@EMPOWERgma... 48 first replies
3 Brent@GMATPrepNow 37 first replies
4 Jay@ManhattanReview 26 first replies
5 ErikaPrepScholar 9 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

Most Active Experts

1 image description GMATGuruNY

The Princeton Review Teacher

128 posts
2 image description Rich.C@EMPOWERgma...

EMPOWERgmat

117 posts
3 image description Jeff@TargetTestPrep

Target Test Prep

106 posts
4 image description Max@Math Revolution

Math Revolution

94 posts
5 image description Scott@TargetTestPrep

Target Test Prep

92 posts
See More Top Beat The GMAT Experts