John Knight wrote:
>> "Jet" <thatjetnospam at yahoo.com> wrote in message
> news:3D364DCC.FD04A773 at yahoo.com...> > > If they didn't have the wrong information, or didn't make an error,
> > > >then of the 30% who got it correct, 23% would have gotten it correct
> because
> > > >they guessed, and only 7% would have gotten it correct because they
> > > >understood the problem [ x = total guesses, 0.25x = correct guesses
> 0.75x =
> > > >wrong guesses = 70%, x = .93, 0.25x = .23 = correct guesses, correct
> total
> > > >answers of 30% - 23% correct guesses = 7% (those who knew the
> problem)].
> > >
> > > You cannot determine the percentage who guessed. You persist in
> assuming
> > > that everyone who got the answer wrong guessed randomly, and there is no
> > > evidence of this.
> > >
> >
> > Let's look at his algebra. He states x = total guesses, and 0.25x =
> > correct guesses 0.75 x= wrong guesses.
> >
> > He then figures that 0.75 x= 70%, and thus x = .93.
> >
> > BUT, if we figure .25 x= 30%, x=1.20. We have x with two different
> > values!
> >
> > LOL.
> >
> > J
>> My, my, Jet, you're really working overtime to try to prove the point of
> this thread, aren't you? Two stabs at it so far, and you're still off by a
> mile.
Point out what was wrong with my algebra. If there were anything, you
would have pointed it out. Assuming you can do 7th grade math.
>> Don't ask anybody for the answer, ok? This is a closed book quiz. Scout's
> honor?
I won't bother until you give the answer H04, you've had a day to ask
around.
>> John Knight
>> ps--this "math problem" actually is about as simple as many of the TIMSS
> questions where less than zero percent of American girls got the correct
> answer, once adjusted for guesses.
How can a negative number of people get an answer right? Ghosts? An anti
matter universe?
But then, Jet also claims that she never
> guesses on multiple choice questions.
Never made that claim, neither did anyone else.
J
>http://christianparty.net/timssphysics.htm
