A.n≥50
B.p不接近0
C.p接近0.50
D.np或n(1-p)大于5
E.np与n(1-p)均大于5
A.33±4.97
B.33±2.22
C.33±1.65
D.33±1.96
A、50±3.16
B、50±4.97
C、50±1.65
D、50±1.96
A.(15.97,18.53)
B.(15.71,18.79)
C.(15.14,1().36)
D.(14.89,20.45)
A.146
B.246
C.346
D.446
A.P±2.58Sp
B.P±1.96Sp
C.P±1.9
D.P±2.58
E.P±1.96
A.P±2.58Sp
B.P±1.96Sp
C.P±1.96Sx
D.P±2.58Sx
E.X±1.96Sx