Comme un jeu

A soccer player’s number of goals scored in a match is represented by the random variable

X

. The probability distribution for

X

is shown below:

$x$ (goals)	0	1	2	3
$P (X = x)$	0.6	0.1	0.1	0.3

Calculate the standard deviation

σ (X)

, which shows how much the number of goals typically varies from the average per match.( calculatrice

! e

π

( ) % AC sin cos tan 7 8 9 /

\sin^{- 1}

\cos^{- 1}

\tan^{- 1}

4 5 6 *

x^{2}

\sqrt{}

x^y 1 2 3 - ln exp log 0 . = +

and round at two decimal places).

σ (X) =