Probability distributions

Question 1

What is a random variable ?

Answer 1

a variable whose value depends on the outcome of a random event

Question 2

What is a sample space ?

Answer 2

the range of a random variable taking place

Question 3

What is a variable ?

Answer 3

something that can take any value of a range of specific values

Question 4

When is a random variable discrete ?

Answer 4

if the outcome isn’t know until the experiment is carried out

Question 5

What is a probability distribution function ?

Answer 5

the description of the probability of any outcome in the sample space

Question 6

How can probability distributions be shown ?

Answer 6

probability mass function
a table
a diagram

Question 7

How is a probability mass function written ?

Answer 7

P(X=x) = 1/6, x=1,2,3,4,5,6

Question 8

What is it called when all probabilities are the same ?

Answer 8

discrete uniform distribution

Question 9

What is the sum of all probabilities ?

Answer 9

1

Question 10

How can you write a random variable ?

Answer 10

summation of P(X=x)=1