2 Statistics

The discrete random variable $X\,$ has the probability distribution given in the table below, where $a\,$ is a constant.

$x$	0	1	2	3
$P (X = x)$	0.2	0.3	0.25	$a$

Find the value of $a$ .

Find $P (X > 1.2)$ .

Find $P(X≤x)P(X\le x)$ for each of $x = 0, 1, 2, 3$ .

The discrete random variable $X\,$ has the probability distribution given in the table below, where $a\,$ is a constant.

$x$	0	1	2	3
$P (X = x)$	0.2	0.3	0.25	$a$

Find the value of $a$ .

Find $P (X > 1.2)$ .

Find $P(X≤x)P(X\le x)$ for each of $x = 0, 1, 2, 3$ .

2 Statistics Questions