Let [img=47x25]1803a319caed5c0.png[/img] be the uniformly distributed within the unit circle, and the the joint probability density function be [img=501x61]1803a319d67d32e.png[/img]Then the marginal distribution of X in [img=47x25]1803a319caed5c0.png[/img] is also the uniform distribution.

18、【单选题】Why do people of certain profession wear uniform?A、Because uniform is a symbol of one’s class.B、Because uniform erases one’s individuality and stresses uniformity.C、Because uniform makes one look handsome.D、Because uniform is a symbol of one’s social status.

How is flow around a half body obtained? ( ) A: By adding a sink to a uniform flow B: By adding a vortex to a uniform flow C: By adding a source to a uniform flow D: By adding a source and a sink

Which of the following is true of BLUE? 未知类型：{'options': ['It is a rule that can be applied to any one value of the data to produce an estimate.', 'An estimator is linear if and only if it can be expressed as a linear function of the data on the dependent variable.', '', 'It is the best linear uniform estimator.'], 'type': 102}

It can be concluded from the passage that () A: people generally trust a person in uniform B: people enjoy wearing comfortable uniform C: the cost of the uniform is acceptable to people D: people wear uniforms to show their professions