Question

choose correct answer and explain why its true or how you get it?

1/A discrete probability distribution:

a/

assigns a probability to each possible value of the random variable.

b/

can assume values between -1 and +1.

c/

is a listing of all possible values of the random variable.

d/is independent of the parameters of the distribution

2/

The probability that event A occurs, given that event B has occurred, is an example of:

a/

a marginal probability.

b/

more than one of the above.

c/

a conditional probability.

d/a joint probability.

3/

QUESTION 28

The variable in a normal distribution can assume any value between

a/		-4 and +4.
b/		-1 and +1.
c/		-3 and +3.
d/		-? and +?.

Answer 1

1) A discrete probability distribution:

assigns a probability to each possible value of the random variable.

this is the definition of a dicrete probability distribution.

2)

The probability that event A occurs, given that event B has occurred, is an example of

Conditional Probability.

because there is a condition attached, given that one even has occured , it gives the probabillity of another event happening.

3)The variable in a normal distribution can assume any value between

-1 and 1

This can be verified by the standard normal distribution table.