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OpenStudy (anonymous):
Consider a random variable X that takes on the values 0, 1, 2, 3. We specify the function f(x) = -2 + x. Is f(x) a probability mass function?
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OpenStudy (anonymous):
Is it No because the first and second Kolmogorov axioms are being violated?
OpenStudy (sdfgsdfgs):
no, because f(1)=-1 n first axiom requires P(x) >=0
OpenStudy (anonymous):
SO, then it is No because the probabilities do not sum to 1? I just realised the Axiom thing.
OpenStudy (sdfgsdfgs):
do not sum to 1 will be the second axiom but f(x) does not even satisfy the first of being non-negative.
OpenStudy (anonymous):
Ok thank you so much!
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OpenStudy (sdfgsdfgs):
welcome
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