# What is the meaning of **Sample** in **Sample ACF**

What is the meaning of Sample in Sample ACF (autocorrelation function)

It's the empirical ACF computed using the sample.

• @Mbaz: I'm not clear on why it's not an answer ? Maybe you want a formula. Oct 8 '19 at 1:10
• Mark -- my mistake, I'm sorry. I have retracted the flag.
– MBaz
Oct 8 '19 at 2:10
• no problem. the formula has a denominator that is not trivial so I didn't remember it. Oct 8 '19 at 15:31