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һx10×2=201
1˾ͬƷWֵ20%\仯ϵ?.58I(y)\仯ϵ?.37f_
Aҷͬ Byҷմ CyҷС Dж
2зУͨǻͶԷɢĹ˾з
A¹¾?B(zhn) C Dͨ
3йӓϵ_f
AϵӳƱĹ˾з
Bϵ0fùƱ
CCȯЦϵԽԽ
DͨCȯϣϵCտԷɢ
4ϵӳ
A˾I BƱĹ˾з C˾ DƱC
5f_
ACȯͶϵĽǼƽǸϵļƽ
BκI(y)κ¶оIպͲ
CIտԷɢϊ
Dԏ˾зպCգͶ˾ҪͨsA
6 ɷɢͶðҪ^
AI B CC D˾з
7rʜ,{_\( )
A.Ǹֵƫ̶ B.ֵͬr,Խ,Խ
C.ֵͬr,Խ,Խ D.gĿķ SD
8\ͨǻͶʷɢķ( )
A.Σ B.ͨ C.չ D. SC
9йCKf_( )
A.Cͨɢݚɢ B.´ĸɵC
C.ֹƱrC(zhn),沢?BR>D.ƱͶr,ͶCKIJ SB
10ͶһCȯϣCȯʡ`Ȩ¹PƹP??A1020035B1525065ô _Ľۡ
AͶϵ\һ25% BͶϵ\ܴ25%
CͶϵ\С25% DͶϵ\25%
SC
Ͷϵ\㹫ʽ?BR>11ͶĿYb֪סҷֱֵ5%10%ֱ10%19%ô
AĿķճ̶sĿķճ̶ BĿķճ̶СĿķճ̶
CĿķճ̶oĿķճ̶ D_
SA
ֵͬnԽԽ
12ijƱĦϵ1б_
AùƱCմCƱķ
BùƱCСCƱķ
CùƱCKCƱķ
DùƱCCƱķ
SC
IJUϵĺ塣?ùƱCմCƱķգϵС1ùƱCСCƱķգijƱĦϵ1ùƱCKCƱķ
x
1CȯͶʷգf_У
AI(y)еȯ`sգȯһȫ
Bȯȫϵ]CrӰ?BR>CͨͶ˴ʧxͨͶR
DԏƱԹȯϵͣС
2ЧͶܽͻɢ sδؽ?BR> AC B˾з Cɷɢ Dϵy(tng) Eϵy(tng)
3CȯͶʷգf_У
Aطеȯ`sգȯһȫ
Bȯȫϵ]CrӰ?BR>CͨͶ˴ʧxͨͶR
DԏƱԹȯϵͣС
EʲеԖգȯһȶȯ
4ͨͶTԣ
AĿմҪ\ʾ BһrСĿ
CһrСĿ DˮƽͬrʽߵĿ
5ͶʽʲrٵķҪ
A`s BͶʷ CC Dϵy(tng)
6ǻʿԽݚɢ
Aɶ B CI D E
7EɷɢKУ
A(zhn) Bչ Cr?Dͨ
8;IK;У
AŬռCƷ BʹP?BR> C߹̶ȫռ\ D͵λ?E`۸
9ԂC֤ȯͶʱ˵ȷ?
AAǻrֵ BһȡβԷ
CͶҪԽ]CȯĹ۸Խ
DͶҪԽ]CȯĹ۸Խ
EͶʹCȯδֵ乺?BR>10EУմСУ
Aֵ B C D
SB,C,D
EУմСбHܸϵsϵ
11PCȯACȯBɵCȯϣ Pķ
ACȯABķ BCȯAB֮ϵ
CCȯAB DͶCȯACȯBͶr
SA,B,C
Ͷļ㹫ʳC?BR>12жԷ_У
AݚеͶҪ B\ʽrֵ
CͶҪķճ̶ȳ D\ܵͶ
SA,B,C
Ͷrʺ^ɣxDlġ
ж
1ԖղnAԽ]I(y)ֵԽ
2ʽʽͣմʽȻԳʹãʽȽ]ʳʽṹښGǾͶʹPͷյҪ?
3κͶRҪԷ(zhn){_ͶҪ^˾з
4ӹɶͨDӾrI(y)hdD(zhun) a÷rඐǰȡϢٽX
5ͬrI͵I(y)ȡǷݚɢPƷǸؿԽrõػرܷϵy(tng) ( )
6CȯͶ{ԷɢգrЩCȯKļƽգҲЩCȯļƽ ( )
7ͶĽǶȿտɷCպ˾зգЩտͨǻͶʷɢ
8AδCʳ߸]ͶмCȯ
9Ͷð(zhn)ͶRõijʽrֵDzֶⱨꪪ
S
Ͷð(zhn)ͶRõij(ʽrֵͨ)ʽrֵDzֶⱨꡣ
10öNIƷKΨһǰIĸƷgԍعϵ
S
ྭӪƷǵľ̶ȲͬӯͿ䣬ٷաͳѧϿ֤ƷʺͷـDzȫصġ£ҵʵĊ^־Ӫ١ˣӪƷֻҪȫأͿwӪ?BR>
ġ
1Ͷ10ԪͶABֹƱͨABʷϣйu
Ҫ
1ABֹƱAʣ`ABƱϵ
2ABֹƱͶ5ԪͶϵAʺͱ?BR>3ABֹƱͶr31rͶϵAʺͱ?BR>SӇ
2Rp=wiRi=0.5×20%+0.5×13%=16.5%
p=[WA2A2+WB2B2+2WAWBAB]1/2
=[0.52×24.33%2+0.52×24.76%2+2×0.5×0.5×(0.0598)]1/2
=(0.00022516)1/2
=1.50%
3Rp=wiRi=0.75×20%+0.25×13%=18.25%
p=[WA2A2+WB2B2+2WAWBAB]1/2
=[0.752×24.33%2+0.252×24.76%2+2×0.75×0.25×(0.0598)]1÷2
=(0.0147037)1/2