Let's address the questions from your exercise:

1. What is the mean of the standard normal distribution?

   The mean (μ) of the standard normal distribution is 0.

2. What is the standard deviation of the standard normal distribution?

   The standard deviation (σ) of the standard normal distribution is 1.

3. What letter of the alphabet is used to represent a random variable with a standard normal distribution?

   The random variable is typically represented by the letter Z.

Would you like further details or clarification on these points?

Here are 5 related questions to further your understanding:

1. What is the shape of the standard normal distribution graph?
2. How do you convert a normal variable into a standard normal variable?
3. What is the area under the standard normal curve?
4. How are z-scores related to the standard normal distribution?
5. What is the empirical rule for normal distributions?

Tip: In statistics, z-scores measure how many standard deviations an element is from the mean.