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单选题已知随机变量X的分布函数为F(x),则下述结论不正确的是( )

A.

B.

C.

D.

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时间：2025-10-19 04:33:12

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<img src="https://tihai-oss-cloud.itihey.com/img/011e6498e3833da48718110d373b608d.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/3a6baa200ed79f2f4deba5392d70969a.png">B. 2C. <img src="https://tihai-oss-cloud.itihey.com/img/176ac2b0fe2758af04179238a4821014.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/1f491cd61852426bae3a137435b13592.png">

<img src="https://tihai-oss-cloud.itihey.com/img/8c9e5b54d883e868e83515de0318b99e.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/238a9a6fc205c6a96be94537f83cdf68.png">,<img src="https://tihai-oss-cloud.itihey.com/img/3462423a0fbe6662952eb99923c94fba.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/238a9a6fc205c6a96be94537f83cdf68.png">,<img src="https://tihai-oss-cloud.itihey.com/img/fdd024301733e7fe93aaf6b13eb21515.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/ed4d9345409020d428ce13ca986c01a1.png">,<img src="https://tihai-oss-cloud.itihey.com/img/7e543a73ff43bd07154813138aa1f102.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/238a9a6fc205c6a96be94537f83cdf68.png">,<img src="https://tihai-oss-cloud.itihey.com/img/6b42be0e441b118e4fbc28584f4d6e21.png">

如下四个函数中,( )能作为随机变量的分布函数的是

A. <img src="https://tihai-oss-cloud.itihey.com/img/ffb9b0e3373a1f5352d4468757ab4395.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/3c3b82db3d26450a047c79a7d45153e5.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/8c42c5bb4e36bb897f43ee64cf01be2f.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/779d82cdb1d607348aa3831891f8cca0.png">

下列函数中,可以做随机变量分布函数的是

A. <img src="https://tihai-oss-cloud.itihey.com/img/860a456cbe357b09dfab93cabe321f75.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/97da6f9e0dd5cca07101184c14b9c030.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/9f4948dd21429222448c380bafb73bb0.png"> <img src="https://tihai-oss-cloud.itihey.com/img/eeccb322271791e89281e31682c8c321.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/6c208c28c292ac2906c6fd02c304ef64.png">

<img src="https://tihai-oss-cloud.itihey.com/img/c51a6936221a261d3d84d1f98baeeb46.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/3afb6276fb1b90bfe17d5fa3261add50.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/418cf4abeb6b060b4e5fefad1d584c35.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/f46075a1592931ddbfad06a5b9702070.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/f5adad9967cc537084d18aef6de643eb.png">

<img src="https://tihai-oss-cloud.itihey.com/img/fe04b51fedd0f5a962070ade733bc896.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/a937d495460bcc03b09cedfb67575c31.png">B. 0C. <img src="https://tihai-oss-cloud.itihey.com/img/c4b16a3594b357ed9c0dd6b1ccd77456.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/15f98268dd51f9f8e927e7d8a11af447.png">

下列函数中不能作为随机变量X的分布函数的是( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/86745309fa04deefe2f77a205bdceac6.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/6bced4e3af844b202dde88e4a8df04ec.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/c8e5356f4ecac3ead55bcf0fa94827ac.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/e8c33096e34b7595c9ca72cbeeea13e4.png">

已知随机变量X的分布函数为F(x),则下述结论不正确的是( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/f06818719fce787b9c9758aec7af9a5a.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/8c174d0cb58d2c3ef6451423622900db.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/b3b85b365a21af961722633b161ff74a.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/d4099da6d4879b02f87577cb2a664d6d.png">

下列函数中,能作为某随机变量的分布函数的是( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/396cb397735a624665a02bbac545278d.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/ebe4c7ba65f8aac45227a7dc0d367887.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/2e20c1f89cc0d824965929ddfa22eeb3.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/2a2ce1c25783e40467d1e00d5bfd5445.png">

连续型随机变量X的分布函数为<img src="https://tihai-oss-cloud.itihey.com/img/b87c28ce871c7f6b2924e7b99f724954.png">则常数A,B,C的取值是( )

A. A=-1, B=1/2, C=1B. A=0, B=1/2, C=2C. A=1, B=1, C=2D. A=0, B=1, C=0

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