正态近似法估计总体率的95%可信区间用（）。

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 . ρ±1.65Sp B . ρ±1.96Sp C . ρ±2.58Sp D . ρ±1.96S E . ρ±2.58S

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 . p-1.96S／https://assets.asklib.com/psource/2015111910284088761.jpg ，p+1.96S／https://assets.asklib.com/psource/201511191028446378.jpg ）B . p-2.58S/https://assets.asklib.com/psource/201511191028446378.jpg ，p+2.58S／https://assets.asklib.com/psource/201511191028446378.jpg ）C . p-1.96Sp，p+1.96Sp）D . p-2.58Sp，p+2.58Sp）E . p-1.96Sp，p+1.96Sp）

A . P±2.58S B . P±1.96S C . P±1.96S D . P±2.58S E . X±1.96S

A . 47.55～52.45% B . 48.75～51.25% C . 45～55% D . 49.68～50.32% E . 据此资料不可推知

A . A B . B C . C D . D E . E

A . p±l.96s B . p±1.96ς C . p±2.58ς D . p±1.96s

A . p±1.65S B . p±1.96S C . p±2.58S D . p±1.96S E . p±2.58S

A . p±1.65S B . p±1.96S C . p±2.58S D . p±1.96S E . p±2.58S

A . 某现象实际发生数/可能发生某现象的观察单位总数×K B . p±1.96×Sp C . 某一构成部分的个体数/事物各构成部分个体数的总和×100% D . p±2.58×Sp E . p±2.33×S

A . p±1.65S B . p±1.96S C . p±2.58S D . p+1.96S E . p±2.58S

A . p±1.96s B . p±1.96σ C . p±2.58σ D . p±1.96

A . 正确 B . 错误