# Homework Help: What is the meaning of

1. Feb 2, 2010

### nhrock3

$$f_Y(y)$$

f means density function what are Y and y
?

2. Feb 2, 2010

### Synaesthesia

It's probably the partial derivative of f with respect to Y at y.

3. Feb 2, 2010

Or, in some cases, the capital Y can represent the restriction of the domain of f to Y.

4. Feb 2, 2010

### nhrock3

with respect to probability(its not what you said)

5. Feb 2, 2010

### HallsofIvy

$f_Y$ is the given density function of random variable Y and $f_Y(y)$ is its value for some specific value y.