"John Knight" <johnknight at usa.com> wrote in message
news:HGFZ8.7230$Fq6.531196 at news2.west.cox.net...
>> "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.
>> Don't ask anybody for the answer, ok? This is a closed book quiz.
Scout's
> honor?
>> 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. But then, Jet also claims that she
never
> guesses on multiple choice questions.
>http://christianparty.net/timssphysics.htm
Item G11:
The water level in a small aquarium reaches up to a mark A. After a large
ice cube is dropped into the water, the cube floats and the water level
rises to a new mark B. What will happen to the water level as the ice melts?
Explain your reasoning.
I am actually curious as to what the answer to this question is. Will the
volume of ice, which is greater than that of water offset the parts of the
ice that are above water?
