1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
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82n = 3µ = np = 20×0/01=0/2P(x = 2)=xC n x P201n x ⎛ ⎞( − P)−= ⎜ ⎟0/012× 0/9918= 0/016⎝2⎠1P(a > µ) = P(b > µ) = P(d > µ) =2P(a < µ) = 1−P(a > µ) = 1−P(µ < a < d < b). 1 (7. 4 (8 ⎛3⎞1 3 1 0 1P(X = 3 ) = ⎜ ⎟() ( ) =⎝3⎠2 2 81 7P(a < µ ) = 1 − =8 8E(x) = 6 = nP1V(x) = 3 = nPq ⇒ 6q= 3 ⇒ q =2⎛n⎞P(x ) P(x ) P0qn 1≥ 1 = 1−= 0 = 1−⎜ ⎟ = 1−( )n⎝0⎠ 21 3 15Var (x) = npq = 20 × × = = 3 / 754 2 4Var(x)q = :E(x)µ = np = 20: 1P =2. 1 (9. 4 (10 . 2 (1116Var(x) = npq = 16 ⇒ 20q= 16 ⇒ q = = 0/8 ⇒ p = 0/22020np = 20⇒n = = 1000/2. 2 (12
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