设 [tex=5.571x1.286]07nd9KNvcftTb+wfXo92JVm8LZDNK5ovhx/H6APTmDfmiP99JbTuYnbjk0py3+AZ[/tex] 是来自总体 [tex=4.571x1.286]LRmhD5s3cSvL+1wVnHgBetlebb5yOCStA18K9akua4c=[/tex] 的样本值,且样本的均值 [tex=3.571x1.286]1j5Qi5Gq3ZkxvP/WK+5jUE149whUwKneXaL7+sBoqjA=[/tex]. 则 [tex=0.643x1.286]LHHF5r8Y9VBlpolr/GDm2w==[/tex] 的置信度为0.95的置信区间为[input=type:blank,size:4][/input]
举一反三
- 设总体 [tex=6.071x1.286]/ZR0dAzaI7eKAw6bIvA7M0g+s+6kB+5nIfckJgPP1nhaYFrm8S5qbrfgYj2MPMNG[/tex], [tex=1.0x1.286]51n47HV7nln8qIGpThl1pg==[/tex] 为已知, [tex=0.643x1.286]LHHF5r8Y9VBlpolr/GDm2w==[/tex] 为未知,设 [tex=6.357x1.286]KVoy4dOWnNwvy9BLl7knKSTs09Z9vAkENvcNTgIGA+Upt0L25ih9LiFYXgNs0ZMN[/tex] 是来自 [tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex] 的样本,则 [tex=0.643x1.286]LHHF5r8Y9VBlpolr/GDm2w==[/tex] 的置信水平为 90%的置信区间为[input=type:blank,size:6][/input]
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- 下列方程中是一阶微分方程的是[input=type:blank,size:4][/input]. 未知类型:{'options': ['[tex=8.0x1.571]SnLzj4UlSfnGqNtEzxfZSuZwslGsWxsvP2Y+yf7H578Vefe1Ol/nJT135DjkdnSNNikL3arAj80BjvPHaHCDiA==[/tex]', '[tex=10.571x1.571]JR4yrHJRIZfJXwhFSObwrfajFnWUvXzM/YiA3M6aDKuVBZ8I+7v5iXTXdA3E6Rm4vOE2BCfPwFP2rmRygXKEUDk1qLsNDCJ2p8GEbfCSr2s=[/tex]', '[tex=5.643x1.357]m0sKckxx+jZ9iltApBtB23TBISIOx/g0judcsS+akNFZrUNCq3g+BIVQwGbQEh/C[/tex]', '$y^{(4)}+5 y^{\\prime}-\\cos x=0$'], 'type': 102}
- 设总体[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex]的一组样本观测值为[tex=9.714x1.214]mUWcD9BhIx/5bwnf+56j53eyvFPrWCzZNIprLq8Yvzen6nwezH2+1/NfFmTVlPOS[/tex][br][/br]则样本均值[tex=1.357x0.857]NLkNFxYzuUeCR1RBJZ/FWQ==[/tex][input=type:blank,size:4][/input],样本方差[tex=1.643x1.214]lGMlS9rZabPmgv41B9Nj4w==[/tex][input=type:blank,size:4][/input]
- 已知4阶行列式[tex=0.857x1.286]s+r8LBAs3scxfl88DGExcg==[/tex]的第2列各元素分别为1,3,-2,2,它们的余子式的值分别为3,-2,1,1,则行列式[tex=1.857x1.286]UR3qc7Wmc1qXiz076lSMwQ==[/tex][input=type:blank,size:6][/input] . A: -5 B: 5 C: -3 D: 3