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MAT 135 (8-week online) Video Notes, Module 5 Video 20: Random Variables 1. What is a random variable? 2. What is a probability distribution for a random variable? 3. What does 𝑝(𝑥) stand for? 4. What is the multiplication rule for probabilities? 5. Under what conditions can we use the multiplication rule? Video 21: Binomial Distributions 6. What are the properties of the binomial distribution? 7. What is the mean of a binomial distribution? Video 7: Normal Curves 8. What are properties of a normal curve? 9. How does changing the mean and standard deviation change the shape of a normal distribution? 10. What is the total area under the density curve? Video 8: Normal Calculations 11. What is the Empirical Rule? 12. What is another name for the Empirical Rule? 13. Why use standard deviations as a measure for normally distributed data? 14. How do we calculate the standard score for an observation? 15. How do we use a table to find percentiles for z-scores? Video 9: Checking Assumption of Normality 16. What do we want to look for in a graph to check for normality? What about for a normal quantile plot?