Question

what's the difference between pmf and cdf?

Answer 1

I am asked to graph cdf of X but it would be same as P(X=0) P(X=1) and etc? or I need to draw like P(X>0) and P(X>1) and etc?

Answer 2

while you are at that,what's pdf?

Answer 3

portable document format, but im asking about pmf and cdf not pdf and cdf lol

Answer 4

probability mass function and cumulative distribution function

Answer 5

if \(X\) is a discrete r.v. then the pmf of \(x\) is \(P(X=x)\)

the CDF of \(X\) is

\(P(X\le x)\)

Answer 6

pmf of \(X\) is...

Answer 7

if i have defined x of 1, 2 and so on with probability and im asked is cdf defined for x=1.9? should i just make approximation from graph? or answer no?

Answer 8

\[F_{X}(x)=P(X\le x)\]

\[F_{X}(1.9)=P(X\le 1.9)=P(X\le 1)\]

Answer 9

note that all CFD's are right continuous...so it has to be defined everywhere

Answer 10

* CDF's