登陆题目详情
单选题 设
是来自总体
的样本,若统计量
是未知参数
的无偏估计,则常数C等于( )
A. 
B. 
C. 
D. 
学科：概率论与数理统计
时间：2023-06-12 05:27:24
题目1单选题
设总体https://p.ananas.chaoxing.com/star3/origin/fd3c4a9b9b4cc9e49da977afadd1d018.png,https://p.ananas.chaoxing.com/star3/origin/f049b7921f7f69c7466489671c49e3ca.png 是来自https://p.ananas.chaoxing.com/star3/origin/5020c98929ea8c33fd0160d24a85d47b.png的样本,则下列可作为https://p.ananas.chaoxing.com/star3/origin/f68310b2cd0f69861bc3037b2fb9c03d.png的无偏估计量的是( )A. https://p.ananas.chaoxing.com/star3/origin/cbb3bd49a3ea0e5563dfe19d023736ce.pngB. https://p.ananas.chaoxing.com/star3/origin/1884a88ae26697473ef358c17cadb4fb.pngC. https://p.ananas.chaoxing.com/star3/origin/16ec8ac3176ac4d0e9bcc7a724ea109a.pngD. https://p.ananas.chaoxing.com/star3/origin/b3137d991931352611279dff4ab210de.png
题目2单选题
设总体https://p.ananas.chaoxing.com/star3/origin/e9640143329c9747c43c66345e91d115.png,其中https://p.ananas.chaoxing.com/star3/origin/c7a43a33a2014ad055cf3bcf253d9391.png均未知,https://p.ananas.chaoxing.com/star3/origin/f049b7921f7f69c7466489671c49e3ca.png 是来自https://p.ananas.chaoxing.com/star3/origin/5020c98929ea8c33fd0160d24a85d47b.png的样本,则下列结论正确的是( )A. https://p.ananas.chaoxing.com/star3/origin/939c5ae87669c0aa3c33d72008292e32.png 是https://p.ananas.chaoxing.com/star3/origin/f68310b2cd0f69861bc3037b2fb9c03d.png的无偏估计量B. https://p.ananas.chaoxing.com/star3/origin/b3137d991931352611279dff4ab210de.png是https://p.ananas.chaoxing.com/star3/origin/93d818800ced7cbe5838c4ed00e064f9.png的无偏估计量C. https://p.ananas.chaoxing.com/star3/origin/ffd069ccba955485babdb81ad2065584.png 是https://p.ananas.chaoxing.com/star3/origin/f68310b2cd0f69861bc3037b2fb9c03d.png的无偏估计量D. https://p.ananas.chaoxing.com/star3/origin/fc177b5e5aefa52d2efd17dca1892901.png是https://p.ananas.chaoxing.com/star3/origin/93d818800ced7cbe5838c4ed00e064f9.png的无偏估计量
题目3单选题
某个总体https://p.ananas.chaoxing.com/star3/origin/5020c98929ea8c33fd0160d24a85d47b.png的概率密度为https://p.ananas.chaoxing.com/star3/origin/b07db48315f658e131545ba9395a0591.png,其中https://p.ananas.chaoxing.com/star3/origin/b7000ee149ef2265dfd7654a2acb13cc.png是未知参数,https://p.ananas.chaoxing.com/star3/origin/f049b7921f7f69c7466489671c49e3ca.png 是来自https://p.ananas.chaoxing.com/star3/origin/5020c98929ea8c33fd0160d24a85d47b.png的样本,则参数https://p.ananas.chaoxing.com/star3/origin/5de295c5fbb16b20cacdc20f0a41293e.png的矩估计量的方差是( )A. https://p.ananas.chaoxing.com/star3/origin/5de295c5fbb16b20cacdc20f0a41293e.pngB. https://p.ananas.chaoxing.com/star3/origin/93aee15f664246aea279a02c754aa4f3.pngC. https://p.ananas.chaoxing.com/star3/origin/e585e68f69e431570990c0a783bc09ea.pngD. https://p.ananas.chaoxing.com/star3/origin/3e0ad64664597370b87051ca628a644e.png
题目4单选题
设https://p.ananas.chaoxing.com/star3/origin/f049b7921f7f69c7466489671c49e3ca.png 是来自总体https://p.ananas.chaoxing.com/star3/origin/f2897776944bf46474217a4992fb715d.png的样本,若统计量https://p.ananas.chaoxing.com/star3/origin/0e7749b0d926ee89fa9e3690b1ae7830.png是未知参数https://p.ananas.chaoxing.com/star3/origin/f68310b2cd0f69861bc3037b2fb9c03d.png的无偏估计,则常数C等于( )A. https://p.ananas.chaoxing.com/star3/origin/ca88f737dac684c6b477d413808fcefb.pngB. https://p.ananas.chaoxing.com/star3/origin/be4a15e8ee175be9b08b874558bc3ccd.pngC. https://p.ananas.chaoxing.com/star3/origin/2014fa87c0e4ee15601c8f2a3deea07c.pngD. https://p.ananas.chaoxing.com/star3/origin/c72942e2cdc1f20e1b015ad79d1ab2eb.png
题目5单选题
设https://p.ananas.chaoxing.com/star3/origin/f049b7921f7f69c7466489671c49e3ca.png 是来自总体https://p.ananas.chaoxing.com/star3/origin/a001d3bcd0ef3f31e6aa855a5ee91fa6.png的样本,若统计量https://p.ananas.chaoxing.com/star3/origin/0da26059e3cf7e52f04619ae6e3d674e.png是未知参数https://p.ananas.chaoxing.com/star3/origin/26c14aa35001f6933681cef556a5249b.png的无偏估计,则常数C等于( )A. https://p.ananas.chaoxing.com/star3/origin/ce7c4f338e7c840adab9a5ebd8be3d16.pngB. https://p.ananas.chaoxing.com/star3/origin/47aef3b1cf6ff2dab440165b14da9118.pngC. https://p.ananas.chaoxing.com/star3/origin/540753f071713bf55de045abee653b60.pngD. https://p.ananas.chaoxing.com/star3/origin/570f18e4498ea5e008d7bbd8.png
题目6单选题
设总体, 是来自的样本,则下列可作为的无偏估计量的是( )A. B. C. D.
题目7单选题
设总体,其中均未知, 是来自的样本,则下列结论正确的是( )A. 是的无偏估计量B. 是的无偏估计量C. 是的无偏估计量D. 是的无偏估计量
题目8单选题
某个总体的概率密度为,其中是未知参数, 是来自的样本,则参数的矩估计量的方差是( )A. B. C. D.
题目9单选题
设 是来自总体的样本,若统计量是未知参数的无偏估计,则常数C等于( )A. B. C. D.
题目10单选题
设 是来自总体的样本,若统计量是未知参数的无偏估计,则常数C等于( )A. B. C. D.