设总体[img=101x27]18033e12676f9de.png[/img],[img=36x26]18033e1270720ee.png[/img]未知,从总体中抽取容量为9的样本,测得样本均值[img=11x18]18033e12799eff3.png[/img]=1.56, 样本方差[img=16x22]18033e128279d93.png[/img]=0.81,取置信水平为95%,则以下哪个说法是正确的?(备用数据为:[img=136x27]18033e128a58eae.png[/img][img=136x27]18033e129365326.png[/img][img=142x27]18033e129bdcc0b.png[/img][img=142x27]18033e12a7bcac7.png[/img][img=127x27]18033e12b5d525f.png[/img][img=127x27]18033e12be25b81.png[/img][img=133x27]18033e12c79de58.png[/img][img=133x27]18033e12d0a8ee1.png[/img])
A: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.3695,2.9725)
B: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限为2.3710
C: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.4179,2.3710)
D: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.3406,2.400)
E: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限2.9725
F: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限0.4179
G: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限2.4
H: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限1.9489
A: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.3695,2.9725)
B: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限为2.3710
C: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.4179,2.3710)
D: [img=18x22]18033e12d8ee39d.png[/img]的双侧置信区间为(0.3406,2.400)
E: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限2.9725
F: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限0.4179
G: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限2.4
H: [img=18x22]18033e12d8ee39d.png[/img]的单侧置信上限1.9489
举一反三
- 从正态总体[img=65x27]1802d3c53b59586.png[/img]中取得样本容量为10的样本, 算得样本方差为4. 在置信水平为95%下,以下说法哪个是正确的? A: [img=18x22]1802d3c54490457.png[/img]的双侧置信区间为(1.89,13.33) B: [img=18x22]1802d3c54490457.png[/img]的单侧置信下限为2.13 C: [img=18x22]1802d3c54490457.png[/img]的单侧置信上限为10.83 D: [img=18x22]1802d3c54490457.png[/img]的双侧置信区间为(1.76,11.09) E: [img=18x22]1802d3c54490457.png[/img]的单侧置信下限为1.97 F: [img=18x22]1802d3c54490457.png[/img]的单侧置信上限为9.14 G: [img=18x22]1802d3c54490457.png[/img]的单侧置信下限为1.89 H: [img=18x22]1802d3c54490457.png[/img]的单侧置信下限为1.76 I: [img=18x22]1802d3c54490457.png[/img]的单侧置信上限为11.09 J: [img=18x22]1802d3c54490457.png[/img]的单侧置信上限为13.33
- 从正态总体[img=65x27]18033e1c750025b.png[/img]中取得样本容量为10的样本, 算得样本方差为4. 在置信水平为95%下,以下说法哪个是正确的? A: [img=18x22]18033e1c7d58033.png[/img]的双侧置信区间为(1.89,13.33) B: [img=18x22]18033e1c7d58033.png[/img]的单侧置信上限为10.83 C: [img=18x22]18033e1c7d58033.png[/img]的双侧置信区间为(1.76,11.09) D: [img=18x22]18033e1c7d58033.png[/img]的单侧置信上限为11.09 E: [img=18x22]18033e1c7d58033.png[/img]的单侧置信上限为9.14 F: [img=18x22]18033e1c7d58033.png[/img]的单侧置信上限为13.33
- 某类型元件的寿命X(以小时记)服从[img=65x27]180370ff7ec3745.png[/img],[img=11x18]180370ff8835b80.png[/img]和[img=18x22]180370ff9134a7a.png[/img]均未知。现随机抽测9个元件,测得样本均值为400,样本标准差为9,在置信水平为95%下,以下说法哪个是正确的? A: [img=11x18]180370ff99a9b44.png[/img]的双侧置信区间为(393.08,406.92) B: [img=11x18]180370ff99a9b44.png[/img]的单侧置信下限为394.42 C: [img=11x18]180370ff99a9b44.png[/img]的双侧置信区间为(393.21,406.79) D: [img=11x18]180370ff99a9b44.png[/img]的单侧置信下限为394.50 E: [img=11x18]180370ff99a9b44.png[/img]的单侧置信下限为395.07 F: [img=11x18]180370ff99a9b44.png[/img]的双侧置信区间为(394.12,405.88)
- 某类型元件的寿命X(以小时记)服从[img=65x27]18034ba4e7c341b.png[/img],[img=11x18]18034ba4f0c99ba.png[/img]和[img=18x22]18034ba4f8fdbd5.png[/img]均未知。现随机抽测9个元件,测得样本均值为400,样本标准差为9,在置信水平为95%下,以下说法哪个是正确的? A: [img=11x18]18034ba5021776a.png[/img]的双侧置信区间为(393.08,406.92) B: [img=11x18]18034ba5021776a.png[/img]的单侧置信下限为394.42 C: [img=11x18]18034ba5021776a.png[/img]的双侧置信区间为(393.21,406.79) D: [img=11x18]18034ba5021776a.png[/img]的单侧置信下限为394.50 E: [img=11x18]18034ba5021776a.png[/img]的单侧置信下限为395.07 F: [img=11x18]18034ba5021776a.png[/img]的双侧置信区间为(394.12,405.88)
- 某类型元件的寿命X(以小时记)服从[img=65x27]18032ab91666497.png[/img],[img=11x18]18032ab91f5567e.png[/img]和[img=18x22]18032ab9273ac81.png[/img]均未知。现随机抽测9个元件,测得样本均值为400,样本标准差为9,在置信水平为95%下,以下说法哪个是正确的? A: [img=11x18]18032ab92fded7f.png[/img]的双侧置信区间为(393.08,406.92) B: [img=11x18]18032ab92fded7f.png[/img]的单侧置信下限为394.42 C: [img=11x18]18032ab92fded7f.png[/img]的双侧置信区间为(393.21,406.79) D: [img=11x18]18032ab92fded7f.png[/img]的单侧置信下限为394.50 E: [img=11x18]18032ab92fded7f.png[/img]的单侧置信下限为395.07 F: [img=11x18]18032ab92fded7f.png[/img]的双侧置信区间为(394.12,405.88)