Which one of these is correct: A standard normal distribution has the following characteristics: Question 1 options:

Which one of these is correct:

A standard normal distribution has the following characteristics:

Question 1 options:

1) 

The mean and the variance are both equal to 1

2) 

The mean and the variance are both equal to 0

3) 

The mean is equal to the variance

4) 

The mean is equal to 0 and the variance is equal to 1

5) 

The mean is equal to the standard deviation