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44 18,19,20,21,22 (922 /5(42/5 (3 2 (2 (1 (10 (4 (3 (2 (1 (11. . (3. . : , (12 100 (2<strong>45</strong> (4N (425∑ X ii= 1 (1 (3= 525X2i =i∑= 129 (3(1(2(420 n = 25 (13 21 (225 2∑(Xi − X)i=119 (1 1 25 (14 . 3 25 2 50( 30/5) (41,1,5,3,2,4,2,2 (4:(µ,δ2(30/25) (3) (20/5) (2(20/25) (1: (153 (31 (22 (1
<strong>45</strong> 20 100 (16( ) 150 -157157 -164164 -171171 -178178 -1851525302010. 167(2170(4166 / 3 (1168 / 2 δ 2 µ x a (17δ: xa(3δ 2(4(3(2(1aaa2a 64 (1816 (414 (3δ2δ 2: 12 (26 (1 0/75 17 (19 . 17 75 (1. 17 75 (2. 17 75 (3. 17 25 (4 90 15 (2090 (4 80 (370 (260 (1 X5 = −3,X4= −2,X3 = −1,X2 = 2,X1= −4 (21
Page 1: 43 (4 (3 (1 (2 (1
Page 5 and 6: 47 (2 (4 14 . . (2.
Page 7 and 8: 49 . 2 (1α i= 360×
Page 9 and 10: 51 n 100= = 502 2n− Fi −1m =2
Page 11 and 12: 53fi= ( < < ) . (2( < < ) .
Page 13 and 14: 55P(AU B)2 1P(B) = , P(A) =3 372(4(
Page 15 and 16: 576! (44× ! 3!(3 . 3 ! × 2!
Page 17 and 18: 59 4 3 . 21 (1
Page 19 and 20: 611 81−= ⇒ k = 3 ⇒ µ − kδ
Page 21 and 22: 63 P ( ) = P( )3 4 3 6 1P ( )
Page 23 and 24: 65 4 1 33P(W 1 ) =7 3 2 4P(B1
Page 25 and 26: 67X = xP (X =x) (435 (4 E (
Page 27 and 28: 69 1000 δx= 2µx 770
Page 29 and 30: 71Var(y) = a2Var(x) = ( −2)2× 1/
Page 31 and 32: 73xy012f (y) ( (11 2 3 6 x-18 8
Page 33 and 34: 75 a . 3 (8:
Page 35 and 36: 77 ⎛4⎞⎛66⎞⎛4⎞⎛66⎞
Page 37 and 38: 797(49 ( E(X) = λ)100−1−e λ(4
Page 39 and 40: 81 . . 3 (1λ x = δ
Page 41 and 42: 83E(x) = np = 43 / 2Var(x) = npq =
Page 43 and 44: 85e−λλxP(x) =X!P(X ≥ 2)= 1−
Page 45 and 46: 87f (x) =1µ = δ =λ . .
Page 47 and 48: 89 P( − a < z < a)0/921=2(4 6
Page 49 and 50: 9122− (4(399 1818(40/6587 (
Page 51 and 52: 93 1 3P ( −a< z < a) = 2 φ a
Page 53 and 54:
95P − PP(P < 0/6)= P(Z < ) = P(Z
Page 55 and 56:
97 X . δ = 2 µ =10 (1 (1
Page 57 and 58:
99. (4 n1 + n2−2 (3 X
Page 59 and 60:
101: P(X< 300): (4 E(Z4 )1(
Page 61 and 62:
103 . 2 (7. 3 (8. 2 (9. 4 (
Page 63 and 64:
105 f (x) =1b − a0a < x
Page 65 and 66:
107 (4 (3 (2H 1 :
Page 67 and 68:
1090/31250 (40/343 (3 . 100 0/
Page 69 and 70:
111 . H 0 H 0 . 3 (1
Page 71 and 72:
113 3 2 (4 Y = 3 +0/4X0〈r≤
Page 73 and 74:
115 (4( r = 100r′)X(3 Y,Y( B = B
Page 75 and 76:
117 . X y . r=1 .
Page 77 and 78:
11921212102121012121212121212121012
Page 79 and 80:
121 82-8383 60: ( ) 20:
Page 81 and 82:
123 13 (141Lnλ2(42Lnλ(31
Page 83 and 84:
125 . 4 (10 37374
Page 85 and 86:
127 84-85 60: ( ) 20: .
Page 87 and 88:
1291f (x) =θ (44X، 0< x < θ(4
Page 89 and 90:
131Cov(x, y)= E(xy) − E(x)E(y) =
Page 91 and 92:
133 711E(X / Y = 1)1520(4(4 f (x,
Page 93 and 94:
135 . 225 µ X (18%95
Page 95 and 96:
137 . 380 34-1 (40/75 (4n 2 n
Page 97 and 98:
139f (x / y) =fx (x) =fy (y) =3 x23
Page 99 and 100:
141x-2-10210y413-1-25 . 2 (23.
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