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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## In order to reduce classroom overcrowding ##### This topic has 1 expert reply and 0 member replies ### Top Member ## In order to reduce classroom overcrowding 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 ### GMAT/MBA Expert Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 122 members Upvotes: 1153 GMAT Score: 770 Top Reply 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

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