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Entropy, Joint and Conditional Entropy
What information means, how entropy measures it, and how entropy behaves when several random variables are considered together.
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An event has probability
p
=
1
/
32
p = 1/32
p
=
1/32
.
Give its surprisal
−
log
2
p
-\log_2 p
−
lo
g
2
p
in bits.
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p
ln
log
( )
x
n
√
⌫
AC
7
8
9
+
4
5
6
−
1
2
3
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.
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b
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