# [SOLVED] binomial

• January 29th 2007, 03:41 PM
nurserascal
[SOLVED] binomial
i am not understanding binomial experiments. :(

and how do you calculate expected value.

do you multiply the X list * the P(x) list.
ok. now that you have the total of that, are you supposed to / by the number of entries? :confused:

the calculations of statistics seems easy enough. I am really struggling with what numbers to put where............
• January 29th 2007, 04:41 PM
ThePerfectHacker
Quote:

Originally Posted by nurserascal
i am not understanding binomial experiments. :(

and how do you calculate expected value.

do you multiply the X list * the P(x) list.
ok. now that you have the total of that, are you supposed to / by the number of entries? :confused:

the calculations of statistics seems easy enough. I am really struggling with what numbers to put where............

When you find how the probability when an event happens $n$ (a certain) number of times with a propability $p$ that is called a "binomial experiment" And the formula is,
${ m\choose n}p^n(1-p)^{m-n}$
Where $m$ is the total amount, meaning $n$ happens $n$ out of $m$ times.
• January 29th 2007, 08:56 PM
CaptainBlack
Quote:

Originally Posted by nurserascal
i am not understanding binomial experiments. :(

and how do you calculate expected value.

do you multiply the X list * the P(x) list.