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## [AI] Chapter 13, Probability Density Functions

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• السلام عليكم ورحمة الله وبركاته In chapter 13: Uncertainty, page 469, I couldn t understand how did the author calculate ... nor the
Message 1 of 2 , Feb 24, 2007
السلام عليكم ورحمة الله وبركاته

In chapter 13: Uncertainty, page 469, I couldn't understand how did the author calculate
P( X = 20.5 ) = U[ 18, 26 ]( 20.5 ) = ( 0.125 ) / C
nor the limit at the end of the page!!

Could someone explain please?

Thanks a lot

السلام عليكم ورحمة الله وبركاته
--
Ahmed Mostafa
0123919750
Fourth Year,
Computer Engineering Department,
Faculty of Engineering,
Cairo University
• Uniform distribution simply means that any point is equally likely along the interval 18-26 deg C. So ANY point (say 20.5) is 12.5% likely to happen. All the
Message 2 of 2 , Mar 5, 2007
Uniform distribution simply means that any point is equally likely
along the interval 18-26 deg C. So ANY point (say 20.5) is 12.5%
likely to happen.

All the book is trying to say is that the probability of the
temperature being EXACTLY 20.5 is 0 (the probability of a single point
in a continuous distribution function is zero) but that the
probability of the temperature being "around" 20.5 is 12.5%. That
interval could be say 1/10 of a degree.. so 20.4 -> 20.6.
--- In aima-talk@yahoogroups.com, "Ahmed Mostafa" <eng.ahmed2007@...>
wrote:
>
> ÇáÓáÇã Úáíßã æÑÍãÉ Çááå æÈÑßÇÊå
>
> In chapter 13: Uncertainty, page 469, I couldn't understand how did the
> author calculate
>
> > P( X = 20.5 ) = U[ 18, 26 ]( 20.5 ) = ( 0.125 ) / C
> >
> nor the limit at the end of the page!!
>
> Could someone explain please?
>
> Thanks a lot
>
> ÇáÓáÇã Úáíßã æÑÍãÉ Çááå æÈÑßÇÊå
> --
> Ahmed Mostafa
> 0123919750
> Fourth Year,
> Computer Engineering Department,
> Faculty of Engineering,
> Cairo University
>
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