1. What is a discrete probability distribution? Explain in your own words.
2. What conditions must be satisfied by the probabilities in a discrete probability distribution? Explain what these conditions mean.
3. Describe how to compute the mean (or expected value) of a discrete random variable, and interpret what this quantity tells us about the observed values of the random variable.
4. Describe how to compute the standard deviation of a discrete random variable, and interpret what this quantity tells us about the observed values of the random variable.