# [SOLVED] binomial

• Jan 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............
• Jan 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 \$\displaystyle n\$ (a certain) number of times with a propability \$\displaystyle p\$ that is called a "binomial experiment" And the formula is,
\$\displaystyle { m\choose n}p^n(1-p)^{m-n}\$
Where \$\displaystyle m\$ is the total amount, meaning \$\displaystyle n\$ happens \$\displaystyle n\$ out of \$\displaystyle m\$ times.
• Jan 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.