总体X服从正态分布[img=71x27]1803a75189f584c.png[/img],总体Y服从正态分布[img=71x27]1803a7519321985.png[/img],[img=91x24]1803a7519bfa2d6.png[/img]和[img=82x24]1803a751a527f35.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]1803a751afe4c27.png[/img]=( )
A: [img=18x22]1803a751b869607.png[/img]
B: [img=103x27]1803a751c0aeac6.png[/img]
C: [img=38x27]1803a751ca122bf.png[/img]
D: [img=29x22]1803a751d3f7b4b.png[/img]
A: [img=18x22]1803a751b869607.png[/img]
B: [img=103x27]1803a751c0aeac6.png[/img]
C: [img=38x27]1803a751ca122bf.png[/img]
D: [img=29x22]1803a751d3f7b4b.png[/img]
举一反三
- 总体X服从正态分布[img=71x27]1803c07f3a1c24e.png[/img],总体Y服从正态分布[img=71x27]1803c07f41be899.png[/img],[img=91x24]1803c07f4990ac3.png[/img]和[img=82x24]1803c07f51c4966.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]1803c07f5ca3d40.png[/img]=( ) A: [img=18x22]1803c07f6b013f1.png[/img] B: [img=103x27]1803c07f72cf62e.png[/img] C: [img=38x27]1803c07f7b51015.png[/img] D: [img=29x22]1803c07f834b7a1.png[/img]
- 总体X服从正态分布[img=71x27]1802f2ca6c3f9ac.png[/img],总体Y服从正态分布[img=71x27]1802f2ca75a4933.png[/img],[img=91x24]1802f2ca7e3cec3.png[/img]和[img=82x24]1802f2ca86ec4d2.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]1802f2ca9144111.png[/img]=( ) A: [img=18x22]1802f2ca9a45713.png[/img] B: [img=103x27]1802f2caa3b1945.png[/img] C: [img=38x27]1802f2caac34ef2.png[/img] D: [img=29x22]1802f2cab46e2c5.png[/img]
- 总体X服从正态分布[img=71x27]18031e99d4f1550.png[/img],总体Y服从正态分布[img=71x27]18031e99dd5e134.png[/img],[img=91x24]18031e99e5bda02.png[/img]和[img=82x24]18031e99ed68808.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]18031e99f790d68.png[/img]=( ) A: [img=18x22]18031e9a00f7e6a.png[/img] B: [img=103x27]18031e9a098a848.png[/img] C: [img=38x27]18031e9a12c4a9e.png[/img] D: [img=29x22]18031e9a1b22b71.png[/img]
- 总体X服从正态分布[img=71x27]1802f2c6df08f44.png[/img],总体Y服从正态分布[img=71x27]1802f2c6e7d6fb8.png[/img],[img=91x24]1802f2c6f3cd8e5.png[/img]和[img=82x24]1802f2c6fcc2d71.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]1802f2c70735468.png[/img]=( ) A: [img=18x22]1802f2c70f7400e.png[/img] B: [img=103x27]1802f2c717f6c0c.png[/img] C: [img=38x27]1802f2c72036d92.png[/img] D: [img=29x22]1802f2c728a4417.png[/img]
- 总体X服从正态分布[img=71x27]1802fe38fc37ba3.png[/img],总体Y服从正态分布[img=71x27]1802fe3904045ba.png[/img],[img=91x24]1802fe390b62a44.png[/img]和[img=82x24]1802fe3912e2e29.png[/img]分别是来自总体X和Y的简单随机样本,则[img=210x68]1802fe391c445bf.png[/img]=( ) A: [img=18x22]1802fe392515b18.png[/img] B: [img=103x27]1802fe392d39669.png[/img] C: [img=38x27]1802fe39364e51e.png[/img] D: [img=29x22]1802fe393e47354.png[/img]