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i =1 n i =1 x X n i =1 X i i m = E ( X )= p x X n n i P ( X = i )= p =1 P ( X = i )=16 8 i 2f 1 ::: 6 g n i i p =1 X 1 2 n X x ;x ;:::;x

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“ n k

” p k q n k → e np (np) k k!

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(X n )

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n

Ï

X n

IM‡JL‡O~

B(n, p)

ÏH€‚NC}MI

X n

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X

š‡JIK‡6JL‡6O~

‚NCJ‘ƒ~ˆâ„CJNIKIKCO

P (np)



SLNKPŠ‹KP± ® L*K‹OTJ ‰ ¯B® LNKP²Ÿ³9…

ŒJ

n

~ IL”Î}M€Oƒ$~“L

p

€IKIM~@ĨFH~“LKJL@Ï´CO=FH~ ‡6L|}M~ EGF‚€– ~ }¶‚À‚NCJD{JNOCEGJN‚€~

B(n, p

F€}|‚À‚NCJʃ~

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P (np)

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n ≥ 30

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p ≤ 0.1

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Références

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