【单选题】
You have made a ( ) for 8 twins and 4 singles.
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/0298550533906B4A9C7C9ED86E1277A5.png title=Z0BV$`@HTDET$3QBB8[8{X4.png alt=Z0BV$`@HTDET$3QBB8[8{X4.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/A1FF2D04EF58AA00EB9A04434A51D71D.png title=7(OO_T@5]J$1@T$UDDBO]O2.png alt=7(OO_T@5]J$1@T$UDDBO]O2.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/0547A41913E9F292D274042A778800C9.png title=7NJ4{N9UZR6$F@6A1HTC6{P.png alt=7NJ4{N9UZR6$F@6A1HTC6{P.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/6A3BE481217FD0B27F3C8FFE4C984273.png title=F`1_[8IRV86B(LM%Z0XY8PO.png alt=F`1_[8IRV86B(LM%Z0XY8PO.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/4250696CA8569A2B21F9F1A76EF4F3CC.png title=NXMZ]@$OMV]J{]2EOBOYRZ1.png alt=NXMZ]@$OMV]J{]2EOBOYRZ1.png/>
【单选题】
表达式16/4-2^3*8/4Mod5\2的值为()。
【判断题】
设一组观测值为4,6,4,3,5,4,5,8,4,则样本方差为4.78.
【判断题】
设一组观测值为4,6,4,3,5,4,5,8,4,则样本均值为4.78.
【判断题】
<img src=https://huaweicloudobs.ahjxjy.cn/5F4E584AE73705B21E8BD9BE27DC75A4.png title=8.png alt=8.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/4AF0944367C1599C8F7381898631A46D.png title=8.png alt=8.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/9EE59B844F5E8841EEC397FCBB0E1634.png title=8-1.png alt=8-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/F8E6EB81D5EBB83907F71E5210327CDB.png title=8-2.png alt=8-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/60A688214AC53E41E6D98CA46A8EF269.png title=8-3.png alt=8-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/6E5D4F480FA7FE2DD0E3659AD7427F77.png title=8-4.png alt=8-4.png/>
【判断题】
<img src=https://huaweicloudobs.ahjxjy.cn/922F5955C6CBD4A5A99B6185A8FB8E7D.png title=4.png alt=4.png/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/1E8A240E8C1F631E82009065386C57BE.png title=4.png alt=4.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/027300C3180166A26EAD35F0AE85E539.png title=4-1.png alt=4-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/8103A3A2DA9C5898A2B0FDF5CA8894BA.png title=4-2.png alt=4-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/A36F2ABFD25E1D228485204109F11451.png title=4-3.png alt=4-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/34586DC435F0A13039CD7653EBBB62C0.png title=4-4.png alt=4-4.png/>
【单选题】
若函数<img src=https://huaweicloudobs.ahjxjy.cn/02EB393B75D380128722926150B8653A.png title=4{`5L(Z%EMSRP4A}$MH%%P8.png alt=4{`5L(Z%EMSRP4A}$MH%%P8.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/13DD207B2CB507D4545244686F8C56FE.png title=3_ILGE@4C35@O5I2_T)5(}O.png alt=3_ILGE@4C35@O5I2_T)5(}O.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/BAFC60F96F03B7EEF8B85D89D52F2643.png title=J43OQ}4O@{1Q~RL6]VQHQ_G.png alt=J43OQ}4O@{1Q~RL6]VQHQ_G.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/FED83AF9B59E7D3B9C5D13AEC551294F.png title=PMSJNNCOK1H@AK@T``YPCZM.png alt=PMSJNNCOK1H@AK@T``YPCZM.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/219C01122112CE0CD5E40DC1F538DF69.png title=W8@]K}$4OL2K}~9AA)%Y(VX.png alt=W8@]K}$4OL2K}~9AA)%Y(VX.png/>
【单选题】
已知<img src=https://huaweicloudobs.ahjxjy.cn/6996942FFC33E1FF153E4BCE471421C3.png title=4(@(57O8AS585X563{4A0VX.png alt=4(@(57O8AS585X563{4A0VX.png/>的定义域为( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/951312AE1D3258B3732EDC9C26C1FBCF.png title=@T])GRN}M~9QBFJU(}{WM3D.png alt=@T])GRN}M~9QBFJU(}{WM3D.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/0E8FCB241F7A956422D73021BCA97B22.png title=4(SZG[}G(MCE1L@$~}%FCRI.png alt=4(SZG[}G(MCE1L@$~}%FCRI.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/6D2A1D43207CAB7C6412B347FBA797C5.png title=R]A}4[@I[VTHRQ`QNL[PE`O.png alt=R]A}4[@I[VTHRQ`QNL[PE`O.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/6FC4C53977D96034F0B97D27A66778DA.png title=U@E)]Z79T9`D7@PEHY]K8_9.png alt=U@E)]Z79T9`D7@PEHY]K8_9.png/>