设总体X 服从正态分布[img=65x27]1802f2c743f0a7f.png[/img],[img=113x23]1802f2c7519e713.png[/img]是来自总体X的样本，则 [img=124x52]1802f2c75b3b0c1.png[/img].
举一反三
- 设总体X 服从正态分布[img=65x27]18033962a33b790.png[/img],[img=113x23]18033962b1331b4.png[/img]是来自总体X的样本，则 [img=124x52]18033962bcf17f3.png[/img].
- 设总体X 服从正态分布[img=65x27]1802fe3952e8027.png[/img],[img=113x23]1802fe3960cb0cd.png[/img]是来自总体X的样本，则 [img=124x52]1802fe396b0df46.png[/img].
- 设总体X 服从正态分布[img=65x27]1802f291fa91596.png[/img],[img=113x23]1802f292034a0a7.png[/img]是来自总体X的样本，则 [img=124x52]1802f2920eac3c1.png[/img].
- 设 f(x)=1-2x,g(f(x))=(1-x)/x ,则 [img=51x43]180349caea51829.png[/img] A: 0 B: 1 C: 2 D: 3
- 设 f(x)=1-2x,g(f(x))=(1-x)/x ,则 [img=51x43]180311a45a4ae1d.png[/img] A: 0 B: 1 C: 2 D: 3