Question

A random variable X is defined as the distance a dart lands from the center of the target. The probability density of the variable is p(x). Which statement about X or its probability distribution is generally true?

X is a discrete random variable with an infinite number of values.

The variance of X is 0.

The probability P(x1 < X < x2) is given by the area under the curve between x1 and x2.

The mean value of X is 0.

Answer 1

@SolomonZelman

Answer 2

Is it true that the probability P(x1 < X < x2) is given by the area under the curve between x1 and x2 ?

Answer 3

if P(x) is a continuous density curve

Answer 4

you mean you actually know this?

Answer 5

there is hope

Answer 6

I think that is true

Answer 7

right

Answer 8

you the best

Answer 9

discrete is finite

Answer 10

It cant be A or D

Answer 11

right, it has to be C

Answer 12

actually a discrete distribution can be infinite

Answer 13

but discrete is not a continuous variable. here the distance from center is a continuous variable

Answer 14

true and IT is C