If variance is 0, then p(x=c) = 1 c is constant

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    Constant Variance
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Homework Help Overview

The discussion revolves around the concept of variance in probability and its implications, particularly focusing on the statement that if variance is zero, then the probability of a random variable equaling a constant is one.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are exploring whether the statement in the thread title is to be proven or disproven, with some questioning the clarity of the question itself. Others suggest considering specific assumptions, such as the expectation being zero, to simplify the discussion.

Discussion Status

The conversation is ongoing, with participants offering guidance on clarifying the objective of the proof. There is an acknowledgment of the need to define the question more clearly before proceeding.

Contextual Notes

There is uncertainty regarding whether this is a homework problem, which may influence the nature of the discussion and the expectations for responses.

flying2000
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I think it is easy but I can't figure it out. :(
any help?
 
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Are you trying to prove or disprove the thread title?

Is this homework?
 
You may suppose that the expectation is zero, you know, that makes it (even) easier.
 
I would advise figuring out what you're trying to prove before working on the proof. (The sentence in the title is not a well-posed question!)
 

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