Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Courses » ap-calculus

Topic: guessing on MC
Replies: 6   Last Post: Apr 12, 1998 5:55 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Wayne Murrah

Posts: 31
Registered: 12/3/04
Re: guessing on MC
Posted: Apr 10, 1998 4:30 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

>(snipped)
>2. If their were no penality then, in your example, 20 MC each with five
>choices, you guess on all and you get 4 correct your score is 4. Using the
>penality formula your score is 0, zip, nada. So guessing at random will not
>help or hurt you.


I disagree. The PROBABILITY is that "guessing at random will not help or
hurt you", but we all know that probability is not a guarantee. For
thousands of students guessing on several questions each, the scoring
scheme balances good guesses against bad, but for any INDIVIDUAL student --
unless s/he is particularly lucky (or, at least, not particularly UNlucky)
guessing can significantly damage an otherwise good score. If that student
could take the test over and over, then guessing makes since to me. With
one shot at a performance, however, that evaluates a year's worth of work
and that can be worth a college credit, I advise my students not to take
the risk of guessing unless they can eliminate enough answers on a question
(which is seldom the case) to swing the probability HEAVILY in their favor.

>(snipped)
>Lin McMullin
>Ballston Spa, NY


Wayne Murrah, Chairman, Math Dept.
Porter-Gaud School
300 Albemarle Rd.
Charleston, SC 29414

School: wmurrah@porter.portergaud.edu
Home: wmurrah@awod.com






Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.