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Both npnpnp and n(1โp)n(1-p)n(1โp) must be > 5
ฮผ=np\mu = npฮผ=np
ฯ=np(1โp)\sigma = \sqrt{np(1-p)}ฯ=np(1โp)โ
nnn large, ppp not too close to 0 or 1
Simplifies calculations for large nnn
nnn (trials) and ppp (probability of success)
Becomes more bell-shaped/symmetric
Symmetric
Skewed (asymmetric)
When nnn is large enough
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