2.4 Probability Distributions

68%

A discrete random variable $X\,$ has the probability function:


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

a.

Find the value of $a$

[1]

b.

Find $P (X > 1.2)$

[1]

c.

Construct a table for the cumulative distribution $F (x)$

[2]

68%

A discrete random variable $X\,$ has the probability function:


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

a.

Find the value of $a$

[1]

b.

Find $P (X > 1.2)$

[1]

c.

Construct a table for the cumulative distribution $F (x)$

[2]

2.4 Probability Distributions Questions