- #1

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I would like to make things clear about the notations used in probability. what does X and x in pdf

f[itex]_{X}[/itex](x) means.

-Devanand T

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- Thread starter dexterdev
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- #1

- 194

- 1

I would like to make things clear about the notations used in probability. what does X and x in pdf

f[itex]_{X}[/itex](x) means.

-Devanand T

- #2

- 483

- 3

I would like to make things clear about the notations used in probability. what does X and x in pdf

f[itex]_{X}[/itex](x) means.

-Devanand T

Well, it means whatever the person who wrote it decides that it means. I would guess that fX() is a random function, and x is some sort of value. Like fX(x) could be equal to x + X.

- #3

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The uppercase X designates the random variable. The lowercase x designates some particular value of the random variable.Hi all,

I would like to make things clear about the notations used in probability. what does X and x in pdf

f[itex]_{X}[/itex](x) means.

- #4

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No, it doesn't mean "whatever the person who wrote it decides that it means", and it's best not to guess when you don't know the answer. Suppose you're reading up on chemistry and you come across HWell, it means whatever the person who wrote it decides that it means. I would guess that fX() is a random function, and x is some sort of value. Like fX(x) could be equal to x + X.

- #5

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Thank you sir for the reply.

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